CN218204860U

CN218204860U - Novel inverted siphon

Info

Publication number: CN218204860U
Application number: CN202122606368.0U
Authority: CN
Inventors: 林如丽; 王佳慧; 颜晓民
Original assignee: Gz Municipal Group Design Institute Co ltd
Current assignee: Gz Municipal Group Design Institute Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2023-01-03
Anticipated expiration: 2031-10-27

Abstract

A novel inverted siphon comprises a water inlet well, two pipe sections and a water outlet well, wherein the two pipe sections are the same in length and different in diameter and are respectively a large pipe and a small pipe, a sludge settling tank is arranged at the bottom of the water inlet well or an inspection well of an upstream pipeline close to a water inlet, the pipe sections are divided into a middle section, a descending section and an ascending section, the descending section is provided with a downward slope, the ascending section is provided with an upward slope, the upward slope gradient inclination angle of the ascending section is not more than 30 degrees, the downward slope gradient inclination angle of the descending section is not more than 30 degrees, and sludge sedimentation is prevented; the utility model can pass through the lower part of the barrier, which is convenient for the construction of the drainage pipe duct; the water flow is controlled by the overflow weir in a multi-line mode, and the water flow can flow out simultaneously through the small pipe and the large pipe in an auxiliary mode according to the flow rate; the slope inclination angle of the upward slope of the ascending section is not more than 30 degrees, the cleaning is convenient, a sludge settling groove is arranged at the bottom of the inspection well, sludge is directly discharged, and an accident discharge port and a standby pipeline are further arranged to ensure that the pipeline works normally when in failure.

Description

Novel inverted siphon

Technical Field

The utility model relates to a drainage technology field, concretely relates to novel fall siphon.

Background

The siphonage is caused by the difference between the liquid intermolecular attraction and the potential energy, namely, the water column pressure difference is utilized to make the water flow to the lower part after rising, because the water surface of the pipe orifice bears different atmospheric pressures, the water flows from the side with large pressure to the side with small pressure until the atmospheric pressures on the two sides are equal, the water surface in the container becomes the same height, the water stops flowing, and the water in the container can be pumped out quickly by utilizing the siphonage. The siphon is an ancient invention for human beings, and a peculiar siphon is produced by people as early as 1 century before the public yuan. In fact, the siphoning effect is not entirely caused by atmospheric pressure, and the siphoning phenomenon can be generated in vacuum, and the force for raising the liquid is the cohesive force of molecules among the liquids. When siphoning occurs, the liquid flows in one direction because the liquid flowing out of the pipe is more than the liquid flowing into the pipe and the gravity on the two sides is unbalanced, the liquid flows in one direction, the pressure is lower when the liquid flows into the pipe and the pressure is lower when the liquid rises to a high level, so that bubbles (formed by air or gas with other components) are generated in the pipe, the action height of the siphon is determined by the generation of the bubbles, the liquid is broken by the bubbles, the action force between gas molecules at the two ends of the bubbles is reduced to 0, and the siphoning effect is destroyed, so that the pipe is always filled with water. The siphon is adopted to convey fluid without any external power, so that the method is a novel energy-saving and environment-friendly technology, and has wide application fields, such as long-distance water diversion, tap water distribution, hydroelectric generation, flood prevention and drought resistance, flood overflow irrigation, reservoir dredging, groundwater recharge, submarine ore mining and suction and the like.

SUMMERY OF THE UTILITY MODEL

The utility model provides a novel siphon falls, including inlet well, pipeline section and outlet well, the inlet well or be close to the mud groove is established to the inspection shaft bottom of the upper reaches pipeline of water inlet, the pipeline section has two that the same diameter of length is different, is a big pipe, a tubule respectively, the pipeline section divide into interlude, descending section and ascending section, the descending section have decurrent slope the ascending section has ascending slope, the ascending slope inclination of ascending section is not more than 30, the decurrent slope inclination of descending section is not more than 30, prevent the mud siltation.

Furthermore, the novel inverted siphon adopts a metal pipe or a reinforced concrete pipe, and the pipe diameter is not less than 200mm.

Further, the distance between the top of the middle section horizontal pipe and the river bottom is not less than 1.0m.

Furthermore, the water inlet well is provided with an accident discharge port, and when the accident discharge port cannot be arranged due to sanitary requirements, the water inlet well is provided with a standby pipeline.

Further, the standard flow rate in the novel inverted siphon is designed to be 1.2-1.5M/S, the accident emergency flow rate is limited to be not less than 0.9M/S at the lowest, and the flow rate is not less than the water flow rate in the water inlet pipe.

The inverted siphon of the utility model can pass through the lower part of the barrier when encountering barriers such as rivers, mountain stream, hollow areas or underground structures, etc., thereby facilitating the construction of drainage canals and canals; the inverted siphon of the utility model adopts a compound line mode, controls water flow by the overflow weir, and can flow out simultaneously by the assistance of the small pipe and the large pipe according to the flow; the inverted siphon of the utility model has unique design in dredging, the upward slope gradient dip angle of the ascending section is not more than 30 degrees, the cleaning is convenient, the bottom of the inspection well is provided with a sludge settling groove, and the sludge is directly discharged; the utility model discloses still be equipped with accident discharge port and reserve pipeline, when the trouble, still can ensure the pipeline and normally work, still can be applied to the maintenance.

Drawings

FIG. 1 is a schematic view of the present invention;

in the figure: 1. a water inlet well; 2. a water outlet well; 3. a pipe section; 4. an upstream conduit; 5. an overflow weir/valve; 6. a cover plate; 7. concrete; 31. a rising section; 32. a descending section; 33. a middle section; 8. a sludge settling tank.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

The utility model provides a novel inverted siphon can be applied to long distance drinking water, running water distribution, hydroelectric power generation, flood control and drought resisting, flood discharge irrigation, reservoir desilting, groundwater recharge, submarine ore and adopt and inhale, when meetting barriers such as underground structures, can pass from the barrier below, according to laying of broken line pipeline section, convenient construction the utility model discloses when laying, often the segmentation goes on, should consider the construction scheme that influences the minimum to the traffic. The middle section can be finished by a hidden groove method, and then the pipeline construction operation at the two ends can be carried out by an open groove method.

The utility model discloses a fall siphon is including the well 1 of intaking, pipeline section 3 and outlet well 2, the mud basin 8 is established to the well 1 of intaking or the inspection shaft bottom that is close to the upstream pipeline 4 of water inlet, pipeline section 3 divide into interlude 33, descending branch 32 and ascending branch 31, descending branch 32 has decurrent slope, ascending branch 31 has ascending slope, ascending branch 31's ascending slope inclination is not more than 30, descending branch 32's decurrent slope inclination is not more than 30, prevent the mud siltation, and convenient clearance when desilting, inspection shaft bottom is equipped with mud basin 8, direct mud discharging. In addition, since the dredging of the inverted siphon is much more difficult than that of a general pipe, various measures must be taken to prevent the accumulation of sewage in the inverted siphon, the standard flow rate in the inverted siphon is designed to be 1.2 to 1.5M/S, the emergency flow rate of an accident is limited to be not less than 0.9M/S at the lowest, and the flow rate is not less than the flow rate of water in the inlet pipe section 3 of the inlet well.

In the early stage of design, the size and the number of the inverted siphons are determined through the water discharge, the approximate position of the inverted siphons for crossing the obstacles is determined, and the selected crossing position is feasible and beneficial to the whole pipe network. The main criteria for judging whether the drainage network is feasible and favorable are two points, and firstly, the selection of the position does not cause the overlarge roundabout of the drainage network; and secondly, after passing through the obstacle, the drainage pipeline can continue to be laid according to the embedded depth gradient of the original pipeline to move forward, and can smoothly reach the destination. After the crossing position is selected, the terrain environment where the inverted siphon crosses the obstacle is measured on the spot, and the purpose of measurement is to select the crossing line of the inverted siphon to make the distance between the crossing line and the obstacle close, so that a better construction working surface is provided, the design length of the inverted siphon is reduced, and the construction difficulty is reduced. The method comprises the steps of conducting detailed exploration on the underground geological condition of the selected crossing line, aiming at knowing the geological condition of the crossing line of the inverted siphon, firstly, judging whether geology which is unfavorable for pipe jacking construction exists under the crossing line, such as whether hard objects such as rocks exist at the crossing position, secondly, judging whether adverse effects can be caused on obstacles, such as the river bed position of a river channel, and then, conducting feasibility analysis on detection data, and then determining the pipe crossing depth of the inverted siphon.

The utility model discloses fall the siphon and adopt tubular metal resonator or reinforced concrete pipe, the pipe diameter is not less than 200mm.

The distance between the top of the horizontal pipe of the middle section 33 and the river bottom is not less than 1.0m.

The water inlet well 1 is provided with an accident discharge port, and when the accident discharge port cannot be arranged due to the sanitary requirement, the water inlet well 1 is provided with a standby pipeline. When the fault occurs, the normal work of the pipeline can be still ensured, and the method can also be applied to maintenance.

The utility model discloses a fall siphon, in the calculation, the flow of sewage in falling siphon is carried out by the water head (the surface of water difference of business turn over, outlet well) in the upper and lower reaches pipeline, and this difference in height is used for overcoming the resistance loss that sewage flowed through and falls siphon.

When the inverted siphon is calculated, the pipe diameter and all resistance loss values are calculated, the water level height difference H between the water inlet well and the water outlet well is required to be slightly larger than all resistance loss values H1, and the difference value is generally 0.05-0.10M.

The inverted siphon of the utility model, when used and installed, can cross the obstacle as far as possible to shorten the length of the inverted siphon, and can select the section with good geological conditions through the river course, and can not be easily scoured by water and laid on the section with small burial depth; the number of the inverted siphon pipes passing through the river channel is not less than two, when the recent water quantity can not reach the designed flow rate, one of the inverted siphon pipes can be used, one inverted siphon pipe can be temporarily closed, a working pipeline can be laid through the inverted siphon pipe of the river, the dry ditch and the depression, three pipelines can be laid through the inverted siphon pipe of a special important structure (such as an underground railway), and two pipelines are laid for working and one is reserved.

Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that they can make various equivalent modifications and substitutions without departing from the spirit of the present invention, and therefore, the scope of the present invention is defined by the appended claims.

Claims

1. The novel inverted siphon is characterized by comprising a water inlet well, two pipe sections and a water outlet well, wherein the two pipe sections are the same in length and different in diameter and are respectively a large pipe and a small pipe, a sludge settling tank is arranged at the bottom of the water inlet well or an inspection well of an upstream pipeline close to a water inlet, the pipe sections are divided into a middle section, a descending section and an ascending section, the descending section is provided with a downward slope, the ascending section is provided with an upward slope, the upward slope inclination angle of the ascending section is not more than 30 degrees, the downward slope inclination angle of the descending section is not more than 30 degrees, and sludge sedimentation is prevented;

the design of the standard flow rate in the novel inverted siphon is 1.2-1.5M/S, the emergency flow rate of accidents is limited to be not less than 0.9M/S at the lowest, and the flow rate is not less than the flow rate of water in the water inlet well.

2. The novel inverted siphon according to claim 1, characterized in that the novel inverted siphon is a metal pipe or a reinforced concrete pipe, and the pipe diameter is not less than 200mm.

3. The novel inverted siphon according to claim 1, characterized in that the tube top of the horizontal tube in the middle section is not less than 1.0m from the river bottom.

4. The inverted siphon according to claim 1, wherein said inlet well is provided with an accident discharge port, and when said accident discharge port cannot be set due to sanitary requirements, said inlet well is provided with a spare pipeline.