Municipal pipe network system structure capable of avoiding reverse flowing water

Abstract

The invention relates to the technical field of municipal pipe networks, in particular to a municipal pipe network system structure capable of avoiding reverse flowing water, and solves the problems that a drainage pipeline of a municipal pipe network is often blocked by sludge and garbage during operation, the drainage speed is reduced, and the reverse flowing water phenomenon is likely to occur. And reverse flow water mechanisms are arranged on the inner sides of the water pipe assemblies correspondingly, and water passing mechanisms are arranged on the outer surfaces of the water pipe assemblies correspondingly. Through connection of the water passing mechanism, when the water level in the water passing pipe is high, the backflow phenomenon is likely to happen at the moment, the flowing speed of water flow is decreased, water can be pumped from the lower water outlet through the water pumping pipe through the water suction pump at the moment, and water in the water passing pipe is pumped into the water conveying pipe through the water pumping pipe; and the water flows out from the upper water inlet in the surface of the next water passing pipe through the water conveying pipe, so that water flow is realized, the conditions of overhigh water level and water passing pipe blockage are avoided, and the drainage speed is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of municipal pipe networks, and in particular to a municipal pipe network system structure for preventing backflow of water. Background Art

[0002] Municipal pipe network projects fall within the scope of municipal engineering, including underground power supply pipelines, rainwater pipelines, sewage pipelines, water supply pipelines, fire protection pipelines, gas pipelines, communication pipelines, and community intelligent pipelines; Among them, rainwater pipes, sewage pipes and water supply pipes are more common. Drainage pipes are installed in the sewers of various places to discharge sewage, rainwater, etc. During the discharge process, backflow may occur due to reasons such as pipe blockage.

[0003] The drainage pipes of the existing municipal pipe network are often blocked by silt and garbage during operation, resulting in a decrease in drainage speed and prone to backflow. Therefore, it does not meet the existing needs. In this regard, we propose a municipal pipe network system structure that avoids backflow. Summary of the Invention

[0004] The purpose of the present invention is to provide a municipal pipe network system structure that avoids backflow of water, so as to solve the problems proposed in the above background technology that the drainage pipes of the municipal pipe network are often blocked by silt and garbage during operation, resulting in a decrease in drainage speed and the occurrence of backflow of water.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a municipal pipe network system structure for preventing backflow of water, comprising a plurality of assembled installation shells, each of which has a water pipe assembly installed on its inner side, a backflow mechanism provided on the inner side of the water pipe assembly, and a water flow mechanism provided on the outer surface of the water pipe assembly; The water pipe assembly includes a water pipe, an upper water inlet and a lower water outlet. The water pipe is installed on the inner side of the installation shell, and the outer surface of the water pipe is provided with an upper water inlet and a lower water outlet symmetrically distributed. The water flow mechanism includes a water storage platform, a water suction pipe, a water pump and a water supply pipe. The water storage platform is movably inserted into the interior of the lower water outlet. The outer surface of the water storage platform is fixedly connected with a water suction pipe. The outer side of the water supply pipe is fixedly connected with a water pump. The end of the water suction pipe away from the water storage platform is fixedly connected to the input end of the water pump. The output end of the water pump is fixedly connected with the water supply pipe. The end of the water supply pipe away from the water pump is movably inserted into the interior of the upper water inlet on another water supply pipe.

[0006] Preferably, the water pipe assembly also includes a filter plate, a disassembly and assembly groove, a ball bearing and a connecting plate. The filter plate is slidably installed on one side of the inside of the water pipe, and the connecting plate is fixedly installed on the other side of the inside of the water pipe. The connecting plate on one water pipe is movably inserted into the inner side of the other water pipe. Four evenly distributed disassembly and assembly grooves are provided on the side of the inner surface of the water pipe close to the filter plate. Sliders are fixedly installed on the outer surface of the filter plate, and the slides are slidably inserted into the disassembly and assembly grooves. A plurality of ball bearing grooves are provided on the side surface of the water pipe with the disassembly and assembly grooves, and balls are movably installed inside the ball bearing grooves. The balls on the surface of one side of the water pipe fit into the outer surface of the connecting plate on the other water pipe.

[0007] Preferably, the water pipe assembly also includes a snap-on outer ring groove, a rotating groove, a trapezoidal fixed platform and an external through hole. The inner wall surface of the lower water outlet is provided with a rotating groove, and the interior of the upper water inlet and the lower water outlet are fixedly installed with a trapezoidal fixed platform. The outer surface of the trapezoidal fixed platform is provided with four external through holes, and the outer end surface of the connecting plate is provided with a snap-on outer ring groove.

[0008] Preferably, the reverse water flow mechanism includes a gear box, a transverse rotating shaft, a square fixed block, a semicircular plate, a grille, a clamping block and a square slot. The gear box is installed at the center position inside the water pipe. Both sides of the gear box are connected to the transverse rotating shaft through a coupling. One end of the transverse rotating shaft away from the gear box is fixedly installed with a square fixed block, and the other end of the transverse rotating shaft away from the gear box is fixedly installed with a semicircular plate. A semicircular opening is provided on the surface of the semicircular plate, and a grille is installed at the position of the semicircular opening on the surface of the semicircular plate. Four evenly distributed clamping blocks are fixedly installed on one side of the semicircular plate, and a square slot is provided in the middle of the other side of the semicircular plate. The square fixed block in one water pipe is movably clamped into the square slot in the other water pipe.

[0009] Preferably, the reverse water flow mechanism also includes a vertical rotating shaft, a transmission gear, a trapezoidal rotating table, an inner through hole, a scraper, a fixed table, a servo motor and a bottom ring groove of the fixed table. The upper and lower sides of the gear box are connected to the vertical rotating shaft through a coupling, and the end positions of the vertical rotating shaft are fixedly installed with the fixed table, and both sides of the bottom end of the fixed table are fixedly installed with an L-shaped connecting rod, and a trapezoidal rotating table is provided under the fixed table, and the bottom end of the L-shaped connecting rod is fixedly connected to the outer surface of the trapezoidal rotating table, and the bottom end of the trapezoidal rotating table is movably inserted into the interior of the rotating groove, and a servo motor is fixedly installed inside the fixed table, and a fixed table bottom ring groove is opened on the bottom surface of the fixed table, and a plurality of scrapers are fixedly installed on the outer surface of the output end of the servo motor, and the scrapers are movably installed in the bottom ring groove of the fixed table, and four inner through holes are opened on the outer surface of the trapezoidal rotating table, and four transmission gears that mesh with each other are movably installed inside the gear box, and the ends of the horizontal rotating shaft and the vertical rotating shaft are fixedly connected to the transmission gear.

[0010] Preferably, the trapezoidal fixed platforms are movably inserted into the interior of the trapezoidal rotating platform, and the inner diameters of the outer through holes and the inner through holes are consistent.

[0011] Preferably, the surface of the scraper is in contact with the outer surface of the trapezoidal rotating platform, and a plurality of brushes are installed on the outer surface of the scraper.

[0012] Preferably, a plurality of support tubes are fixedly mounted on the top and bottom surfaces of the interior of the installation shell, and the outer surfaces of the water pipes fit in contact with the outer surfaces of the support tubes.

[0013] Preferably, one side surface of the semicircular plate is in contact with the outer side surface of the connecting plate, and the clamping blocks are movably installed in the clamping outer ring groove.

[0014] Preferably, the water extraction pipe is spirally arranged on the outside of the water pipe, a filter screen is installed at the opening of the outer surface of the filter plate, and filter screens are installed inside the outer through hole and the inner through hole.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention cooperates with the upper water inlet, the lower water outlet and the water-passing mechanism, so that the water delivery pipe is inserted into the upper water inlet on the surface of the next water-passing pipe, and each water-passing pipe is connected through the water-passing mechanism; when the water level inside the water-passing pipe is high, backflow is likely to occur. At this time, a water pump can be used to pump water from the lower water outlet through the water pumping pipe, so that the water inside the water-passing pipe is pumped out through the water pumping pipe into the water delivery pipe, and then flows out from the upper water inlet on the surface of the next water-passing pipe through the water delivery pipe, thereby avoiding congestion of the water pipe due to excessive water level and improving the drainage speed; The present invention uses a backflow mechanism, and the device can adjust the delivery mode according to the drainage speed, so that the water flow speed can be adjusted according to different situations. When the water level is low, it flows through the opening of the grille net. When the water level is high, the opening of the grille net is placed at a high position by rotating the horizontal axis, so that water flows through the water flow mechanism to avoid backflow at low water level. At the same time, the grille net is used to block the silt and garbage accumulated under the water pipe to avoid affecting the water flow speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present invention as a whole; Figure 2 Schematic diagram of the splicing structure of the water pipe in the present invention; Figure 3 Schematic diagram of a half-section structure of the water pipe in the present invention; Figure 4 A cross-sectional front view of the present invention as a whole; Figure 5 A sectional side view of the present invention as a whole; Figure 6 A cross-sectional top view of the present invention as a whole; Figure 7 for Figure 5 A magnified view of the structure of part A in the middle.

[0017] Figure: 1. Mounting housing; 2. Water pipe assembly; 201. Water pipe; 202. Filter plate; 203. Assembly and disassembly slot; 204. Ball bearing; 205. Upper water inlet; 206. Lower water outlet; 207. Connecting plate; 208. Snap-fit outer ring groove; 209. Rotation slot; 210. Trapezoidal fixing platform; 211. External through hole; 3. Reverse water flow mechanism; 301. Gearbox; 302. Horizontal axis; 303. Square fixing block; 304. Vertical axis ; 305, semicircular plate; 306, grille; 307, clamping block; 308, transmission gear; 309, square slot; 310, trapezoidal rotating table; 311, inner through hole; 312, scraper; 313, fixed table; 314, servo motor; 315, bottom ring groove of fixed table; 316, L-shaped connecting rod; 4, water flow mechanism; 401, water storage table; 402, water suction pipe; 403, water pump; 404, water supply pipe; 5, support pipe. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] See also Figures 1 to 7 The present invention provides an embodiment of a municipal pipe network system structure for preventing backflow of water, comprising a plurality of assembled installation shells 1, each of which is provided with a water pipe assembly 2 on its inner side, each of which is provided with a backflow mechanism 3 on its inner side, and each of which is provided with a water flow mechanism 4 on its outer surface; The water pipe assembly 2 includes a water pipe 201, an upper water inlet 205 and a lower water outlet 206. The water pipe 201 is installed on the inner side of the installation shell 1. The outer surface of the water pipe 201 is provided with symmetrically distributed upper water inlet 205 and lower water outlet 206. The water flow mechanism 4 includes a water storage platform 401, a water suction pipe 402, a water pump 403 and a water supply pipe 404. The water storage platform 401 is movably inserted into the interior of the lower water outlet 206. The outer surface of the water storage platform 401 is fixedly connected to the water suction pipe 402. The outer side of the water supply pipe 201 is fixedly connected to the water pump 403. The end of the water suction pipe 402 away from the water storage platform 401 is fixedly connected to the input end of the water pump 403. The output end of the water pump 403 is fixedly connected to the water supply pipe 404. The end of the water supply pipe 404 away from the water pump 403 is movably inserted into the interior of the upper water inlet 205 on another water supply pipe 201.

[0020] The water pipe assembly 2 also includes a filter plate 202, a disassembly and assembly groove 203, a ball bearing 204 and a connecting plate 207. The filter plate 202 is slidably installed on one side of the inside of the water pipe 201, and the connecting plate 207 is fixedly installed on the other side of the inside of the water pipe 201. The connecting plate 207 on one water pipe 201 is movably inserted into the inner side of the other water pipe 201. Four evenly distributed disassembly and assembly grooves 203 are provided on the side of the inner surface of the water pipe 201 close to the filter plate 202. Sliders are fixedly installed on the outer surface of the filter plate 202, and the sliders are slidably inserted into the disassembly and assembly grooves 203. A plurality of ball bearing grooves are provided on the side surface of the water pipe 201 provided with the disassembly and assembly groove 203, and balls 204 are movably installed inside the ball bearing grooves. The balls 204 on the surface of one side of the water pipe 201 are fitted with the outer surface of the connecting plate 207 on the other water pipe 201.

[0021] The water pipe assembly 2 also includes a snap-on outer ring groove 208, a rotation groove 209, a trapezoidal fixing platform 210 and an outer through hole 211. The inner wall surface of the lower water outlet 206 is provided with a rotation groove 209, and the interior of the upper water inlet 205 and the lower water outlet 206 are fixedly installed with a trapezoidal fixing platform 210. The outer surface of the trapezoidal fixing platform 210 is provided with four outer through holes 211, and the outer end surface of the connecting plate 207 is provided with a snap-on outer ring groove 208.

[0022] The reverse flow mechanism 3 includes a gear box 301, a transverse shaft 302, a square fixed block 303, a semicircular plate 305, a grille 306, a clamping block 307 and a square clamping slot 309. The gear box 301 is installed at the center of the water pipe 201. Both ends of the gear box 301 are connected to the transverse shaft 302 through a coupling. One end of the transverse shaft 302 away from the gear box 301 is fixedly installed with a square fixed block 303, and the other end of the transverse shaft 302 away from the gear box 301 is fixedly installed with a square fixed block 303. A semicircular plate 305 is fixedly installed at one end of the wheel box 301, and a semicircular opening is provided on the surface of the semicircular plate 305. A grille 306 is installed at the position of the semicircular opening on the surface of the semicircular plate 305. Four evenly distributed clamping blocks 307 are fixedly installed on one side of the semicircular plate 305, and a square clamping groove 309 is provided in the middle of the other side of the semicircular plate 305. The square fixed block 303 in one water pipe 201 is movably clamped into the square clamping groove 309 in the other water pipe 201.

[0023] The reverse water flow mechanism 3 also includes a vertical shaft 304, a transmission gear 308, a trapezoidal rotating platform 310, an inner through hole 311, a scraper 312, a fixed platform 313, a servo motor 314 and a bottom ring groove 315 of the fixed platform. The upper and lower sides of the gear box 301 are connected to the vertical shaft 304 through a coupling. The end position of the vertical shaft 304 is fixedly installed with a fixed platform 313. Both sides of the bottom end of the fixed platform 313 are fixedly installed with an L-shaped connecting rod 316. A trapezoidal rotating platform 310 is provided below the fixed platform 313. The bottom ends of the L-shaped connecting rods 316 are fixedly connected to the outer surface of the trapezoidal rotating platform 310. The bottom end of the rotating table 310 is movably inserted into the rotating groove 209, and a servo motor 314 is fixedly installed inside the fixed table 313. A fixed table bottom ring groove 315 is provided on the bottom end surface of the fixed table 313. A plurality of scrapers 312 are fixedly installed on the outer surface of the output end of the servo motor 314. The scrapers 312 are all movably installed in the fixed table bottom ring groove 315. The outer surface of the trapezoidal rotating table 310 is provided with four internal through holes 311. Four mutually meshing transmission gears 308 are movably installed inside the gear box 301. The ends of the horizontal rotation axis 302 and the vertical rotation axis 304 are fixedly connected to the transmission gear 308.

[0024] The trapezoidal fixed platform 210 is movably inserted into the interior of the trapezoidal rotating platform 310 , and the inner diameters of the outer through hole 211 and the inner through hole 311 are consistent.

[0025] The surface of the scraper 312 is in contact with the outer surface of the trapezoidal rotating platform 310 , and a plurality of brushes are installed on the outer surface of the scraper 312 .

[0026] A plurality of support tubes 5 are fixedly mounted on the top and bottom surfaces of the interior of the installation shell 1 , and the outer surface of the water pipe 201 is in contact with the outer surface of the support tube 5 .

[0027] One side surface of the semicircular plate 305 is in contact with the outer surface of the connecting plate 207 , and the clamping blocks 307 are movably mounted inside the clamping outer ring groove 208 .

[0028] The water extraction pipe 402 is spirally arranged outside the water pipe 201 . A filter screen is installed at the opening of the outer surface of the filter plate 202 . Filter screens are installed inside the outer through hole 211 and the inner through hole 311 .

[0029] When using the municipal pipe network system structure for preventing backflow of water, the connecting plate 207 on one water pipe 201 is first inserted into one side of another water pipe 201 to connect the multiple water pipes 201 to each other. At this time, the square fixing block 303 is inserted into the square card slot 309 to splice the backflow mechanisms 3 inside the multiple water pipes 201 to each other. The filter plate 202 in the outermost water pipe 201 (the water pipe 201 to which the filter plate 202 is not connected) is removed to connect the outermost water pipe 201 with the water inlet pipe, and the upper water inlet 205 on the outermost water pipe 201 is blocked with a plug. When water flows, water enters through the side of the outermost water pipe 201 and exits from the grid mesh 306 on the last water pipe 201.

[0030] When the water level inside the water pipe 201 is low, the outermost horizontal shaft 302 is driven to rotate, so that the horizontal shaft 302 drives the transmission gear 308 to rotate, and then the transmission gear 308 drives each horizontal shaft 302 and the vertical shaft 304 to rotate, and the semicircular plate 305 rotates with the horizontal shaft 302, so that the grille 306 on the semicircular plate 305 rotates to the position below the water pipe 201, so that it rotates to the position as shown in FIG. Figure 3 As shown, at this time, the vertical rotating shaft 304 rotates simultaneously, driving the fixed platform 313 to rotate, and at the same time, driving the trapezoidal rotating platform 310 to rotate through the L-shaped connecting rod 316, so that it rotates outside the trapezoidal fixed platform 210, and the positions of the outer through hole 211 and the inner through hole 311 are misaligned, thereby closing the water flow in and out of the upper water inlet 205 and the lower water outlet 206, allowing the low water level water to flow directly through the grille 306.

[0031] When the water level inside the water pipe 201 is high, sludge and garbage will accumulate at the bottom of the water pipe 201, slowing down the water flow and easily blocking the grille 306, resulting in blockage and backflow. At this time, the outermost horizontal shaft 302 is driven to rotate, so that the horizontal shaft 302 drives the transmission gear 308 to rotate, and the transmission gear 308 drives each horizontal shaft 302 and the vertical shaft 304 to rotate. The semicircular plate 305 will rotate with the horizontal shaft 302, so that the grille 306 on the semicircular plate 305 rotates to a position above the water pipe 201, and the vertical shaft 304 will rotate synchronously. The rotation of the vertical shaft 304 drives the fixed platform 313 to rotate synchronously. The fixed platform 313 drives the trapezoidal rotating platform 310 to rotate through the L-shaped connecting rod 316. 310 rotates on the outside of the trapezoidal fixed platform 210, causing the inner through hole 311 to rotate to the position of the outer through hole 211, thereby opening the water flow in and out of the upper water inlet 205 and the lower water outlet 206. At this time, the water in the water pipe 201 will enter the interior of the water storage platform 401 through the lower water outlet 206, and the water will be pumped into the water supply pipe 404 through the water pump 403 through the water pump pipe 402, and the water will be discharged from the upper water inlet 205 into the interior of the next water pipe 201 through the water supply pipe 404, realizing the transportation of water inside the water pipe 201. At the same time, since the grille net 306 rotates to the position above the water pipe 201, the water at the high water level position inside the water pipe 201 will circulate through the grille net 306, avoiding the blockage of the grille net 306 with silt and garbage.

[0032] When water flows through the upper water inlet 205 and the lower water outlet 206, the scraper 312 is driven to rotate by the servo motor 314. The scraper 312 rotates along the output end of the servo motor 314 as the axis, and the outer surface of the outer through hole 211 is cleaned by the brush on its surface to prevent garbage from accumulating at the position of the outer through hole 211 and affecting the water flow into the lower water outlet 206.

[0033] When the water pipe 201 needs to be maintained or cleaned, the multiple water pipes 201 are first removed from each other, and then the filter plate 202 is pulled outward so that the filter plate 202 is removed from the water pipe 201 through the track of the disassembly and assembly groove 203. The staff enters the water pipe 201 to clean or replace the water pipe assembly 2 and the backflow mechanism 3 for maintenance.

[0034] When the semicircular plate 305 rotates, the balls 204 reduce the friction between the semicircular plate 305 and the water pipe 201, thereby reducing the wear of the semicircular plate 305 and the water pipe 201 and improving the service life of the device.

[0035] Through the cooperation of the square fixing block 303 and the square card slot 309, multiple reverse water flow mechanisms 3 are combined with each other. When the outermost horizontal rotation axis 302 rotates, the square fixing block 303 is inserted into the square card slot 309, and all the horizontal rotation axes 302 are driven to rotate at the same time; when there are many reverse water flow mechanisms 3, one of the horizontal rotation axes 302 equipped with the square fixing block 303 is removed, so that the multiple reverse water flow mechanisms 3 are split into multiple combinations, which is convenient for managing and controlling the reverse water flow mechanisms 3 inside the water pipe 201 at different nodes.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A municipal pipe network system structure for preventing backflow of water, comprising a plurality of assembled installation shells (1), characterized in that: A water pipe assembly (2) is installed on the inner side of the installation shell (1), a water backflow mechanism (3) is provided on the inner side of the water pipe assembly (2), and a water flow mechanism (4) is provided on the outer surface of the water pipe assembly (2); The water pipe assembly (2) comprises a water pipe (201), an upper water inlet (205) and a lower water outlet (206); the water pipe (201) is installed on the inner side of the installation shell (1); and the upper water inlet (205) and the lower water outlet (206) are symmetrically distributed on the outer surface of the water pipe (201); The water supply mechanism (4) comprises a water storage platform (401), a water pumping pipe (402), a water pump (403) and a water delivery pipe (404). The water storage platform (401) is movably inserted into the interior of the lower water outlet (206). The outer surface of the water storage platform (401) is fixedly connected to the water pumping pipe (402). The outer side of the water delivery pipe (201) is fixedly connected to the water pump (403). One end of the water pumping pipe (402) away from the water storage platform (401) is fixedly connected to the input end of the water pump (403). The output end of the water pump (403) is fixedly connected to the water delivery pipe (404). One end of the water delivery pipe (404) away from the water pump (403) is movably inserted into the interior of the upper water inlet (205) on another water delivery pipe (201).

2. A municipal pipe network system structure for preventing backflow of water according to claim 1, characterized in that: The water pipe assembly (2) further comprises a filter plate (202), a disassembly groove (203), a ball bearing (204) and a connecting plate (207). The filter plate (202) is slidably mounted on one side of the interior of the water pipe (201), and the connecting plate (207) is fixedly mounted on the other side of the interior of the water pipe (201). The connecting plate (207) on one of the water pipes (201) is movably inserted into the inner side of the other water pipe (201). The inner surface of the water pipe (201) is close to the filter plate (202). ) is provided with four evenly distributed disassembly and assembly grooves (203) on one side, and sliders are fixedly installed on the outer surface of the filter plate (202), and the sliders are slidably inserted into the disassembly and assembly grooves (203). The water pipe (201) is provided with a plurality of ball grooves on the side surface on which the disassembly and assembly grooves (203) are provided, and balls (204) are movably installed inside the ball grooves, and the balls (204) on the surface of one side of one water pipe (201) are in contact with the outer surface of the connecting plate (207) on the other water pipe (201).

3. A municipal pipe network system structure for preventing backflow of water according to claim 2, characterized in that: The water pipe assembly (2) further comprises a snap-fit outer ring groove (208), a rotation groove (209), a trapezoidal fixing platform (210) and an outer through hole (211); the inner wall surface of the lower water outlet (206) is provided with a rotation groove (209); the upper water inlet (205) and the lower water outlet (206) are both fixedly mounted with a trapezoidal fixing platform (210); the outer surface of the trapezoidal fixing platform (210) is provided with four outer through holes (211); and the outer end surface of the connecting plate (207) is provided with a snap-fit outer ring groove (208).

4. A municipal pipe network system structure for preventing backflow of water according to claim 3, characterized in that: The reverse flow mechanism (3) comprises a gear box (301), a transverse shaft (302), a square fixing block (303), a semicircular plate (305), a grille (306), a clamping block (307) and a square clamping groove (309). The gear box (301) is installed at the center position inside the water pipe (201). Both sides of the gear box (301) are connected to the transverse shaft (302) through a coupling. One end of the transverse shaft (302) away from the gear box (301) is fixedly mounted with a square fixing block (303). The other transverse shaft (302) is fixedly mounted with a square fixing block (303). A semicircular plate (305) is fixedly installed at one end away from the gear box (301), a semicircular opening is opened on the surface of the semicircular plate (305), a grille (306) is installed at the position of the semicircular opening on the surface of the semicircular plate (305), four evenly distributed clamping blocks (307) are fixedly installed on one side of the semicircular plate (305), and a square clamping groove (309) is provided in the middle of the other side of the semicircular plate (305), and the square fixed block (303) in one water pipe (201) is movably clamped into the square clamping groove (309) in the other water pipe (201).

5. A municipal pipe network system structure for preventing backflow of water according to claim 4, characterized in that: The reverse water flow mechanism (3) further comprises a vertical rotating shaft (304), a transmission gear (308), a trapezoidal rotating platform (310), an inner through hole (311), a scraper (312), a fixed platform (313), a servo motor (314) and a bottom ring groove (315) of the fixed platform. The upper and lower sides of the gear box (301) are connected to the vertical rotating shaft (304) via a coupling. The end positions of the vertical rotating shaft (304) are fixedly mounted with the fixed platform (313). Both sides of the bottom end of the fixed platform (313) are fixedly mounted with L-shaped connecting rods (316). The trapezoidal rotating platform (310) is provided below the fixed platform (313). The bottom ends of the L-shaped connecting rods (316) are fixedly connected to the outer surface of the trapezoidal rotating platform (310). The bottom end of the trapezoidal rotating platform (310) is movably inserted into the interior of the rotating groove (209), a servo motor (314) is fixedly installed inside the fixed platform (313), a fixed platform bottom ring groove (315) is provided on the bottom end surface of the fixed platform (313), a plurality of scrapers (312) are fixedly installed on the outer surface of the output end of the servo motor (314), and the scrapers (312) are all movably installed in the fixed platform bottom ring groove (315), the outer surface of the trapezoidal rotating platform (310) is provided with four inner through holes (311), and four mutually meshing transmission gears (308) are movably installed inside the gear box (301), and the ends of the horizontal rotation shaft (302) and the vertical rotation shaft (304) are both fixedly connected to the transmission gear (308).

6. A municipal pipe network system structure for preventing backflow of water according to claim 5, characterized in that: The trapezoidal fixed platform (210) is movably snapped into the interior of the trapezoidal rotating platform (310), and the inner diameters of the outer through hole (211) and the inner through hole (311) are consistent.

7. The municipal pipe network system structure for preventing backflow of water according to claim 5, characterized in that: The surface of the scraper (312) is in contact with the outer surface of the trapezoidal rotating platform (310), and a plurality of brushes are installed on the outer surface of the scraper (312).

8. The municipal pipe network system structure for preventing backflow of water according to claim 1, characterized in that: A plurality of support tubes (5) are fixedly mounted on the top and bottom surfaces of the interior of the mounting housing (1), and the outer surface of the water pipe (201) is in contact with the outer surface of the support tube (5).

9. The municipal pipe network system structure for preventing backflow of water according to claim 5, characterized in that: One side surface of the semicircular plate (305) is fitted with the outer surface of the connecting plate (207), and the clamping blocks (307) are movably mounted in the clamping outer ring groove (208).

10. The municipal pipe network system structure for preventing backflow of water according to claim 5, characterized in that: The water extraction pipe (402) is arranged in a spiral shape on the outside of the water pipe (201), a filter screen is installed at the opening of the outer surface of the filter plate (202), and a filter screen is installed inside the outer through hole (211) and the inner through hole (311).

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