CN-121992857-A - Automatic drainage intercepting and backflow preventing device

CN121992857ACN 121992857 ACN121992857 ACN 121992857ACN-121992857-A

Abstract

The invention belongs to the field of municipal drainage, and particularly relates to an automatic drainage interception and backflow prevention device which comprises a main well chamber and an auxiliary well chamber, wherein an interception valve is arranged in the main well chamber and connected with an interception sewage pipe, the interception valve comprises a buoyancy tank, a connecting rod, a conical valve core, a sealing disc and a counterweight lead block, a valve body is arranged between the conical valve core and the buoyancy tank, and one side of the valve body, which is far away from the interception sewage pipe, is a closed end. The shutoff valve can dynamically control the conical valve core to move up and down according to the change of the liquid level through the buoyancy of the buoyancy tank, so that dynamic shutoff is realized, the backflow of river water in a river channel at a high water level can be stopped through the backflow prevention structure, and meanwhile, the designed backflow prevention flap valve utilizes the submerged suspension characteristic, so that the defect that the self-weight opening resistance of the traditional rainwater backflow prevention device is high, and the drainage performance of a drain pipe is influenced to play incompletely is overcome.

Inventors

NIAN SHILEI
WANG HAIYANG
FU SHUYIN
XIAO PENGFEI
SI YINGMING
WANG JUAN
WANG YAN
ZHAO FAN

Assignees

济南城建集团有限公司
济南城建设计研究院有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260401

Claims (10)

1. The automatic drainage intercepting and backflow preventing device comprises a main well chamber and an auxiliary well chamber, wherein a diversion trench (16) and a interception trench (3) are arranged in the main well chamber, the diversion trench (16) is communicated with a confluence pipe (2), an interception sewer pipe (1) is communicated with the main well chamber, the other end of the diversion trench (16) is communicated with the auxiliary well chamber, an anti-backflow flap valve (4) is arranged in the auxiliary well chamber corresponding to the diversion trench (16), the automatic drainage intercepting and backflow preventing device is characterized in that an intercepting valve is arranged in the main well chamber and is connected with the interception sewer pipe (1), the intercepting valve comprises a buoyancy tank (6), a connecting rod (10) is downwards fixedly connected in the middle of the lower surface of the buoyancy tank (6), a conical valve core (7) is fixed at the bottom end of the connecting rod (10), a sealing disc (8) is fixed at the bottom surface of the conical valve core (7), a counter weight lead block (12) is arranged between the conical valve core (7) and the auxiliary well chamber, the connecting rod (10) penetrates through the valve body (9), the inner cavity of the valve body (9) is hollow, a guide pipe (13) is arranged on the upper surface of the valve body (9), the upper surface of the valve body (9) is provided with a guide pipe (9), the lower surface of the buoyancy tank (6) is provided with a sealing disc (11) and the sealing disc (11) with the largest diameter, the largest diameter is not limited in the sealing disc (11) and is sealed, and the largest diameter is sealed and limited in the diameter (11) and is sealed and limited in the largest, one side of the valve body (9) far away from the intercepting sewer (1) is a closed end.
2. The automatic drainage interception and backflow prevention device according to claim 1, wherein the diversion trench (16) is divided into a advection section (14) and a rapid flow section (15), the rapid flow section (15) is inclined downwards, and the rapid flow section (15) faces to one side of the auxiliary well chamber.
3. The automatic drainage intercepting and anti-backflow device according to claim 2, wherein the height of the lowest point of the rapid flow section (15) is 40-60cm lower than the height of the lowest point of the advection section (14).
4. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the top end of the interception groove (3) is lower than the top end of the diversion groove (16) and higher than the bottom of the diversion groove (16), and the bottom end of the interception groove (3) is lower than the bottom of the diversion groove (16).
5. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the density of the backflow prevention flap valve (4) is 1.05-1.1 times of the water density.
6. The automatic drainage interception and backflow prevention device according to claim 1 or 2 is characterized in that the conical valve core (7) is made of hard plastic materials.
7. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the maximum diameter of the conical valve core (7) is 1-1.5cm smaller than the inner diameter of the limit sealing short pipe (11).
8. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the diameter of the sealing disc (8) is 2-4cm larger than the outer diameter of the limiting sealing short tube (11).
9. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the guide pipe (13) has an inner diameter 2-3mm larger than the diameter of the connecting rod (10).
10. The automatic drainage interception and backflow prevention device according to claim 1 or 2, wherein the upper surface of the valve body (9) is flush with the bottom of the interception groove (3).

Description

Automatic drainage intercepting and backflow preventing device Technical Field The invention belongs to the field of municipal drainage, and particularly relates to an automatic drainage interception and backflow prevention device. Background The river course is the important facility that urban flood discharge drained waterlogging, and flood season guarantees urban safety flood, and daily landscape water as the city is supplied for citizen to rest and is vwatched, receives the river physical segmentation, in order to reduce sewage and discharges into the river course, has sewage to be responsible for to intercept along river sewage along the river course many constructions, and current city exists partial confluence pipe to intercept into the river condition, because river water flood season is risen, and the river course outlet is located below the water line more, appears the river course and flows backward, because interception pipe and sewage pipeline intercommunication cause a large amount of river water to get into sewage pipe network, increase sewage factory load. Traditional interception is mostly fixed interception, interception flow is not limited, rainwater is continuously intercepted and enters a sewage plant to increase sewage load during rainfall in flood season, and water quality is reduced. The traditional anti-backflow valve is mainly a gate or a flap valve to prevent backflow, and has large resistance or inconvenient operation, so that the performance of the sewage pipe network is affected. In view of the above problems, it is considered to develop a backflow preventing device having an automatic shutoff function and low opening resistance. Disclosure of Invention The invention aims to solve the problems of overcoming the defects of the background technology and providing an automatic drainage interception and backflow prevention device. The invention is realized by the following technical scheme: The utility model provides an automatic shutoff of drainage, prevent flowing backward device, includes main well room and auxiliary well room, sets up guiding gutter and interception groove in main well room, guiding gutter and flow converging tube intercommunication, interception sewer pipe and main well room intercommunication, the guiding gutter other end and auxiliary well room intercommunication, the installation of auxiliary well room corresponds guiding gutter position and prevents flowing backward flap valve, the main well is indoor has set up the shutoff valve, and the shutoff valve is connected with the interception sewer pipe, the shutoff valve includes buoyancy case, the connecting rod of fixed connection downwards in the middle of the buoyancy case lower surface, the bottom mounting of connecting rod has the toper case, toper case bottom surface fixed seal dish, and the counter weight lead block is fixed to the sealing dish bottom surface, is equipped with the valve body between toper case and buoyancy case, and the connecting rod passes the valve body inside cavity, and the valve body upper surface is equipped with the stand pipe, is equipped with spacing seal nozzle stub at the valve body lower surface, and the maximum diameter of toper case is not greater than spacing seal nozzle stub external diameter, and one side that the valve body kept away from the sewer pipe is the blind end. Preferably, the diversion trench is divided into a advection section and a rapid flow section, and the rapid flow section) is inclined downwards, and the rapid flow section faces one side of the auxiliary well chamber. Preferably, the height of the lowest point of the rapid flow section is 40-60cm lower than that of the lowest point of the advection section. Preferably, the top end of the intercepting groove is lower than the top end of the intercepting groove and higher than the bottom of the intercepting groove, and the bottom end of the intercepting groove is lower than the bottom of the intercepting groove. Preferably, the density of the anti-backflow flap valve is 1.05-1.1 times of the water density. Preferably, the conical valve core is made of hard plastic materials. Preferably, the maximum diameter of the conical valve core is 1 cm to 1.5cm smaller than the inner diameter of the limit seal short tube. Preferably, the diameter of the sealing disc is 2-4cm larger than the outer diameter of the limiting sealing short pipe. Preferably, the guide tube has an inner diameter 2-3mm greater than the diameter of the connecting rod. Preferably, the upper surface of the valve body is flush with the bottom of the intercepting groove. The cut-off valve additionally arranged on the automatic cut-off and backflow prevention device for drainage can dynamically control the conical valve core to move up and down according to the change of the liquid level through the buoyancy of the buoyancy tank, so that dynamic cut-off is realized. Meanwhile, the improved anti-backflow structure enables the diversion trench to