CN212641714U

CN212641714U - Anti-backflow device

Info

Publication number: CN212641714U
Application number: CN202021136018.1U
Authority: CN
Inventors: 王秋景; 王月萍
Original assignee: Huatian Engineering and Technology Corp MCC
Current assignee: Huatian Engineering and Technology Corp MCC
Priority date: 2020-06-18
Filing date: 2020-06-18
Publication date: 2021-03-02
Anticipated expiration: 2030-06-18

Abstract

The utility model discloses a prevent flowing backward device. The device comprises a flap valve arranged at the tail end of a pipeline, a buoyancy tank arranged at a natural water body and a connecting rod assembly for connecting the flap valve and the buoyancy tank, wherein the connecting rod assembly comprises a first connecting rod, a second connecting rod, a third connecting rod, a fourth connecting rod and a fifth connecting rod; the lower end of the first connecting rod is connected with the buoyancy tank, and the upper end of the first connecting rod is connected with the upper end of the second connecting rod; the lower end of the second connecting rod is connected with the lower end of the third connecting rod; one end of the fourth connecting rod is connected with the upper end of the third connecting rod, and the other end of the fourth connecting rod is connected with the flap valve; the top end of the fifth connecting rod is fixed with the pipeline, the fifth connecting rod is respectively connected with the second connecting rod and the third connecting rod through the first rotating shaft and the second rotating shaft, and the second connecting rod and the third connecting rod can rotate around the first rotating shaft and the second rotating shaft. The utility model discloses a but buoyancy and lever principle automatic control flap valve open and close, have dry season or just rain and cut dirty abandon stream, the normal drainage of middle and later stages, and prevent flowing backward when reaching the heavy rainstorm and wait function, solve flap valve function singleness, automatically controlled valve fragile scheduling problem.

Description

Anti-backflow device

Technical Field

The utility model relates to a dirty processing apparatus technical field of rain especially relates to a prevent flowing backward device.

Background

Along with the continuous development of society and the improvement of human living standard, the problem of black and odorous water in urban water is prominent, the life of residents is seriously influenced, the appeal and the craving of the residents for 'clean rivers' are strong, and the main reason for forming the black and odorous water is pollution caused by mixed flow of rain and sewage discharged into a river channel. When rainstorm occurs, the water level of natural water bodies such as a river channel rises, and clean water bodies flow backwards to a sewage pipe network, so that the load of a sewage plant exceeds the standard, and the sewage treatment efficiency is influenced. The traditional flap valve has single function and can only prevent backflow. In actual engineering, most valves or flap valves are electrically controlled, and are easily damaged when being in a sewage environment for a long time, so that the repair cost is high; generally, in sunny or rainy seasons, the electric valve does not need to be maintained; in plum rain season, the damage rate of the electric valve is high, the electric valve is inconvenient to maintain, the device cannot play a functional role, and the reliability of the device completely depending on electric control is greatly reduced.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, an object of the present invention is to provide a backflow prevention device suitable for the end of a rain and sewage collecting pipe, so as to thoroughly solve the problems of single function of the traditional flap valve and easy damage of the electric control valve; the sewage-intercepting and flow-discarding device has multiple functions of normally discharging rainwater in middle and later periods and preventing backflow into a pipeline when the water level outside the pipeline rises, and effectively reduces the pollution of sewage to natural water.

The above purpose is realized by the following technical scheme:

according to the utility model discloses an aspect, the utility model provides a pair of prevent flowing backward device installs the end-to-end connection natural water department at municipal administration dirty confluence pipeline of rain. The backflow prevention device comprises: install at the terminal bat door of pipeline, be located the flotation tank of natural water department and connect the link assembly of bat door and flotation tank, link assembly includes: the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod and the fifth connecting rod; the lower end of the first connecting rod is connected with the buoyancy tank, and the upper end of the first connecting rod is connected with the upper end of the second connecting rod; the lower end of the second connecting rod is connected with the lower end of the third connecting rod; one end of the fourth connecting rod is connected with the upper end of the third connecting rod, and the other end of the fourth connecting rod is connected with the flap valve; the top of fifth connecting rod and the lower fixed surface of pipeline, the fifth connecting rod is connected with second connecting rod and third connecting rod respectively through first pivot and second pivot, the second connecting rod is rotatable around first pivot, the third connecting rod is rotatable around the second pivot.

Preferably, a sliding groove is formed in the third connecting rod (at the joint with the second rotating shaft), and the second rotating shaft is arranged in the sliding groove and can move up and down in the sliding groove. The first rotating shaft and the second connecting rod may be connected by a pin, so that the second connecting rod may rotate around the rotating shaft, but not limited thereto, for example, a rotating hole may be provided on the second connecting rod, the first rotating shaft penetrates the rotating hole, and an end portion of the first rotating shaft extends out of the rotating hole, and a diameter of the rotating shaft is smaller than an inner diameter of the rotating hole, so that the second connecting rod may rotate around the first rotating shaft.

More preferably, the sliding groove is further provided with a limiting member for adjusting a movable range in the sliding groove.

Preferably, the fifth connecting rod is of an L-shaped structure and comprises a transverse edge and a vertical edge, the top end of the vertical edge is fixed to the pipeline, the transverse edge is perpendicularly connected with the first rotating shaft, and the vertical edge is perpendicularly connected with the second rotating shaft. Specifically, a first through hole and a second through hole are respectively formed in the transverse edge and the vertical edge of the fifth connecting rod, and the first rotating shaft and the second rotating shaft respectively penetrate through the first through hole and the second through hole and are fixedly connected with the fifth connecting rod.

Preferably, the device further comprises a telescopic joint, and the telescopic joint is installed between the first connecting rod and the buoyancy tank.

Preferably, the fourth connecting rod is of an inverted L-shaped structure, a cross rod of the fourth connecting rod is connected with the third connecting rod, a vertical rod of the fourth connecting rod is hinged to the flap valve through a sixth connecting rod, and a plane formed by the fourth connecting rod and the sixth connecting rod is perpendicular to a plane formed by the first connecting rod, the second connecting rod and the third connecting rod.

Preferably, the first connecting rod is of an inverted L-shaped structure, a cross rod of the first connecting rod is connected with the second connecting rod, and a vertical rod of the first connecting rod is connected with the buoyancy tank; the third connecting rod is of a C-shaped structure, and an opening faces the second connecting rod; the second connecting rod and the sixth connecting rod are straight rods.

Preferably, the first connecting rod and the second connecting rod, the second connecting rod and the third connecting rod, and the third connecting rod and the fourth connecting rod are detachably connected. Such as a threaded connection or a pinned connection, etc. More preferably, the first connecting rod and the second connecting rod, the second connecting rod and the third connecting rod, the third connecting rod and the fourth connecting rod, and the first rotating shaft and the second connecting rod are connected through a pin shaft.

Preferably, a connection member is provided on an outer surface of the flap door, and an end of the sixth link is disposed in the connection member and is rotatable therein.

The utility model provides an operation use of preventing flowing backwards device: the anti-backflow device is arranged at the position where the tail end of the pipeline is connected with a natural water body, and the flap valve is in an open state in an initial state; when the liquid level of the natural water body rises, the buoyancy tank rises to drive the connecting rod assembly to rotate around the first rotating shaft and the second rotating shaft, so that the flap valve is closed; when the liquid level of the natural water body descends, the buoyancy tank descends to drive the connecting rod assembly to rotate around the first rotating shaft and the second rotating shaft in the opposite direction, and therefore the flap valve is opened.

Further, according to the liquid level of the natural water body (or the height difference between the natural water body and the pipeline), the rising height of the liquid level after rainstorm is estimated (namely the rising height cannot be reached after rainstorm), and the opening angle of the flap valve, the installation angles among the first connecting rod, the second connecting rod, the third connecting rod and the fourth connecting rod are determined, the length of a sliding chute which is positioned on the third connecting rod and is internally provided with a second rotating shaft is determined, and the length of a telescopic joint which is arranged between the first connecting rod and the buoyancy tank is determined.

The utility model discloses following beneficial effect has: the device is mainly applied to the tail end of a municipal rainwater and sewage converging pipe, and can control the opening and closing of a flap valve of the pipe according to the height of the liquid level outside the pipe, so that the rainwater and sewage converging pipe can normally intercept and abandon sewage in dry seasons or early rains, rainwater in the middle and later periods normally drains out of the pipe to a natural water body, and the water body is prevented from flowing backwards into the pipe when the water level outside the pipe rises, and the device integrates multiple functions of intercepting and abandoning sewage, draining water, preventing backflow and the like; the flap valve overcomes the defect of single function of the traditional flap valve, can control the opening and closing of the flap valve only by depending on buoyancy and a lever principle, does not need manual work or intervention of an electric control system, has simple and reliable structure and low design and manufacturing cost, and has wide engineering application value.

Drawings

FIG. 1 is a schematic structural view of the flap valve of the anti-back flow device of the present invention in an open state;

FIG. 2 is a schematic structural view of the flap valve of the anti-back flow device of the present invention in a closed state;

fig. 3 is a front view of the anti-back flow device of the present invention.

In FIGS. 1-3: 1, a buoyancy tank; 2, knocking a door; 18 pipes; 3 a first connecting rod, 4 a second connecting rod, 5 a third connecting rod, 7 a fourth connecting rod, 6 a fifth connecting rod and 12 a sixth connecting rod; 9 a first rotating shaft, 10 a second rotating shaft; 11 a chute; 8, chains; 19 a reject flow conduit; 20 telescopic joints; 13 first pin, 14 second pin, 15 third pin, 16 fourth pin, 17 fifth pin.

Detailed Description

The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention:

FIG. 1 schematically illustrates a block diagram of a flap valve in an open position in an overfill prevention device; FIG. 2 schematically illustrates a block diagram of the flapper door in a closed position during a back-filling prevention device; fig. 3 schematically shows a front view of the anti-back-flow device.

The utility model provides a prevent flowing backward device sets up in 18 end-to-end connection natural water departments of dirty confluence pipeline of rain, including installing at 18 terminal flap gate 2 of pipeline, being located the flotation tank 1 of natural water department and connecting flap gate 2 and the link assembly of flotation tank 1. The device can automatically control the opening and closing of the flap valve 2 according to the principles of buoyancy and lever.

A backflow prevention device as shown in fig. 1-3 is composed of a buoyancy tank 1, a flap valve 2, a first connecting rod 3, a second connecting rod 4, a third connecting rod 5, a fifth connecting rod 6, a fourth connecting rod 7, a hinge 8, a first rotating shaft 9, a second rotating shaft 10, a chute 11, a sixth connecting rod 12, a first pin 13, a second pin 14, a third pin 15, a fourth pin 16, a fifth pin 17, a pipeline 18, a flow discarding pipeline 19 and an expansion joint 20.

As shown in fig. 1, the pipe 18 is a combined rain and sewage pipe 18, the lower pipe wall at the end of the pipe 18 is communicated with a sewage pipe network through a drainage pipe 19, sewage is discharged to a sewage treatment plant through the sewage pipe network for operations such as filtration, and the flap valve 2 is installed at the end of the pipe 18, and the flap valve 2 is opened downward, for example, the flap valve 2 may be opened with an open end at the upper end and hinged with the pipe 18 at the lower end. In order to prevent the flap door 2 from falling, the flap door 2 is connected to the duct 18 by a chain 8. In order to ensure the sealing effect of the flap valve 2, a sealing ring is arranged at the circumference of the flap valve 2. In addition, in order to ensure effective drainage, the orifice of the drainage pipeline 19 is set in a diameter-adjustable form so as to be adjusted adaptively according to the sewage flow, and the specific diameter adjustment mode is not limited.

As shown in fig. 3, a connecting member is disposed on the outer surface of the flap door 2, one end of a straight-bar-shaped sixth connecting rod 12 is hinged to the connecting member through a fourth pin 16, the other end of the straight-bar-shaped sixth connecting rod is fixedly connected to the lower portion of a vertical rod of an inverted L-shaped fourth connecting rod 7, and the end of a cross rod of the fourth connecting rod 7 is connected to the upper end of the third connecting rod 5. The flap door 2 is connected to the third link 5 through a straight rod-shaped sixth link 12 and an inverted L-shaped fourth link 7, but the flap door is not limited thereto, and the sixth link 12 and the fourth link 7 may also be integrally formed in a "Z" shape. The structure of the connecting member on the outer surface of the flap door 2 is not particularly limited, and the connecting member may be hinged to the sixth connecting rod 12, for example, the connecting member may be a semicircular structure fixed on the outer surface of the flap door 2, and the sixth connecting rod 12 extends into a hole formed between the semicircular structure and the flap door 2 through a fourth pin 16 to connect the flap door 2 and the sixth connecting rod 12. The plane formed by the fourth link 7 and the sixth link 12 is perpendicular to the plane formed by the first link 3, the second link 4 and the third link 5, that is, the fourth link 7 is perpendicularly connected with the third link 5.

As shown in fig. 1, the third link 5 is a C-shaped structure, and is opened toward the side of the buoyancy tank 1 (i.e., toward the second link 4), and has an upper end connected to the fourth link 7 and a lower end connected to the lower end of the second link 4. The second link 4 is a straight rod and is obliquely installed between the first link 3 and the third link 5. The first connecting rod 3 is in an inverted L shape, one end of the cross rod towards the left is connected with the upper end of the second connecting rod 4, and the lower end of the vertical rod is fixedly connected with the buoyancy tank 1. In order to adapt to different liquid level heights and ensure that the flap valve 2 is closed in place, an expansion joint 20 is also arranged between the first connecting rod 3 and the buoyancy tank 1.

The connection mode between each connecting rod of the first connecting rod 3, the second connecting rod 4, the third connecting rod 5, the fourth connecting rod 7 and the sixth connecting rod 12 in the utility model is preferably a detachable fixed connection mode, such as a threaded connection or a pin connection. Fig. 1 adopts a pin fixing manner, as shown in fig. 1, a first connecting rod 3 and a second connecting rod 4, a second connecting rod 4 and a third connecting rod 5, a third connecting rod 5 and a fourth connecting rod 7, a sixth connecting rod 12 and a flap door 2, and a first rotating shaft 9 and a second connecting rod 4 can be respectively connected and fixed by a first pin 13, a second pin 14, a third pin 15, a fourth pin 16 and a fifth pin 17. However, in order to ensure the operation of the lever system, the flap door 2 and the sixth link 12, the second rotating shaft 10 and the third link 4, and the first rotating shaft 9 and the second link 5 must be connected in a rotating manner, and the connection of the rest of the positions can be realized in a detachable fixed connection manner such as a threaded connection or a pin connection, the angle is adjusted in advance, and then the fixed connection is used in different places.

As shown in fig. 1 to 3, the fifth link 6 is an L-shaped structure, and includes a horizontal side and a vertical side, a top end of the horizontal side is fixed on a bottom surface of the duct 18, the horizontal side and the vertical side are respectively provided with a first through hole and a second through hole, second ends of the first rotating shaft 9 and the second rotating shaft 10 respectively pass through the first through hole and the second through hole to be fixed with the fifth link, the first rotating shaft 9 passes through the rotating hole of the second link 4, the second rotating shaft 10 passes through the sliding slot 11 of the third link 5, the second link 4 can rotate around the first rotating shaft 9, and the third link 5 can rotate around the second rotating shaft 10, that is, the first rotating shaft 9 and the second rotating shaft 10 are fulcrums of the entire lever system.

As shown in fig. 3, the third link 5 is provided with a slide groove 11, and the first end of the second rotating shaft 10 is rotatable or movable up and down in the slide groove 11. Preferably, the length of the sliding chute 11 can also be set in a length adjustable manner so as to adjust the length of the force arm. That is, the position range of the first end of the second rotating shaft 10 in the sliding chute 11 is adjustable, and specifically, the length of the sliding chute 11 is adjustable in a manner that the limiting member passes through the through hole arranged on the wall of the sliding chute 11, so as to prevent the limiting member from moving upwards or downwards.

The following describes in detail the anti-backflow operation of the anti-backflow device with reference to fig. 1 and 2:

firstly, according to the height between the pipeline 18 and the natural water body, the possible rising height of the liquid level after heavy rain and even the opening angle of the flap door 2, the connecting angles among the first connecting rod 3, the second connecting rod 4, the third connecting rod 5 and the fourth connecting rod 7 are determined, the up-down movable length in the chute 11 is determined, and the length of the telescopic joint 20 is determined.

Then, installing and adjusting the anti-backflow device, wherein the flap valve 2 is in an open state (determined by the initial liquid level height of the natural water body, the action of gravity and the like) in the initial state after installation; as shown in fig. 1, at this time, the third link 5 is slightly inclined toward the buoyancy tank 1 side. Under this state, when dry season or early rain, sewage in the pipeline 18 is connected into a sewage pipe network from the pipe orifice of the flow discarding pipeline 19, the flow of the rainwater in the middle and later periods is increased, and the relatively clean rainwater can be directly discharged to the natural water body from the pipeline 18.

When the liquid level of the natural water body rises due to continuous rainfall or rainstorm and other reasons, the buoyancy tank 1 rises due to buoyancy, the connecting rod assembly is driven by the buoyancy tank to rotate by taking the first rotating shaft 9 and the second rotating shaft 10 as fulcrums (namely, the second connecting rod 4 rotates around the first end of the first rotating shaft 9, and the third connecting rod 5 rotates around the first end of the second rotating shaft 10 and rotates anticlockwise at the same time), and finally the flap valve 2 is closed, so that the external water of the pipeline 18 is prevented from flowing backwards into the pipeline 18. As shown in fig. 2, at this time, the third link 5 is approximately vertical and moves upward, so that the first end of the second rotating shaft 10 is located below the chute 11 as seen in fig. 2.

When the rainfall is finished and the liquid level of the natural water body is reduced, the buoyancy tank 1 is also reduced at the same time, the connecting rod assembly is driven by the buoyancy tank to rotate in the opposite direction (rotate clockwise), the flap valve 2 is also reduced and restored to the state shown in figure 1, and the water flow in the pipeline 18 can be circulated again.

The utility model discloses only rely on buoyancy (the height of natural water department liquid level) and lever principle, according to the height automatic control flap valve 2's of 18 outer liquid levels of pipeline opening and close, guaranteed that 18 dry seasons of the dirty confluence pipeline of rain or the first rain time block dirty abandon the flow effectively, middle and later stage rainwater normally discharge tube says 18 to natural water, prevent because of the phenomenon of flowing backward that the condition such as heavy rainstorm or continuous rainfall appear, broken away from the drawback of traditional flap valve 2 function singleness, the problem that the automatically controlled valve of having solved traditional flap valve 2 is fragile.

Claims

1. The utility model provides a prevent flowing backward device installs in pipeline end-to-end connection nature water department, its characterized in that includes: install at the terminal bat door of pipeline, be located the flotation tank of natural water department and connect the link assembly of bat door and flotation tank, link assembly includes: the first connecting rod, the second connecting rod, the third connecting rod, the fourth connecting rod and the fifth connecting rod;

the lower end of the first connecting rod is connected with the buoyancy tank, and the upper end of the first connecting rod is connected with the upper end of the second connecting rod; the lower end of the second connecting rod is connected with the lower end of the third connecting rod; one end of the fourth connecting rod is connected with the upper end of the third connecting rod, and the other end of the fourth connecting rod is connected with the flap valve;

the top end of the fifth connecting rod is fixed with the pipeline, the fifth connecting rod is connected with the second connecting rod and the third connecting rod through the first rotating shaft and the second rotating shaft respectively, the second connecting rod is rotatable around the first rotating shaft, and the third connecting rod is rotatable around the second rotating shaft.

2. The backflow prevention device as claimed in claim 1, wherein a sliding groove is formed on the third link, and the second rotating shaft is disposed in the sliding groove and is movable up and down in the sliding groove.

3. The backflow prevention device as claimed in claim 2, wherein the sliding groove is further provided with a limiting member for adjusting a movable range within the sliding groove.

4. The backflow prevention device as claimed in claim 2, wherein the fifth link is of an L-shaped structure, and comprises a transverse side and a vertical side, the top end of the vertical side is fixed to the pipeline, the transverse side is perpendicularly connected to the first rotating shaft, and the vertical side is perpendicularly connected to the second rotating shaft.

5. The backflow prevention device of claim 1, further comprising a telescopic joint mounted between the first link and the buoyancy tank.

6. The backflow prevention device as claimed in claim 1, wherein the fourth connecting rod is of an inverted L-shaped structure, a cross rod of the fourth connecting rod is connected with the third connecting rod, a vertical rod of the fourth connecting rod is hinged with the flap valve through a sixth connecting rod, and a plane formed by the fourth connecting rod and the sixth connecting rod is perpendicular to a plane formed by the first connecting rod, the second connecting rod and the third connecting rod.

7. The backflow prevention device as recited in claim 6,

the first connecting rod is of an inverted L-shaped structure, a cross rod of the first connecting rod is connected with the second connecting rod, and a vertical rod of the first connecting rod is connected with the buoyancy tank;

the third connecting rod is of a C-shaped structure, and an opening faces the second connecting rod;

the second connecting rod and the sixth connecting rod are straight rods.

8. The backflow prevention device as claimed in claim 6, wherein the first connecting rod and the second connecting rod, the second connecting rod and the third connecting rod, and the third connecting rod and the fourth connecting rod are detachably connected.

9. The backflow prevention device as claimed in claim 6, wherein the first connecting rod and the second connecting rod, the second connecting rod and the third connecting rod, the third connecting rod and the fourth connecting rod, and the first rotating shaft and the second connecting rod are connected through pin shafts.

10. The backflow prevention device according to claim 6, wherein a connection member is provided on an outer surface of the flap door, and an end of the sixth link is disposed in the connection member and rotatable therein.