Water falling structure suitable for high fall of outdoor rain and sewage pipelines in mountainous cities

Abstract

The utility model discloses a drop structure suitable for high drop of outdoor rain and sewage pipelines in mountainous cities, which comprises an upstream drainage pipeline positioned at the upper end of a fort ridge and a downstream drainage pipeline positioned at the lower end of the fort ridge, and further comprises a drop pipe, and an inspection well connected with the upstream drainage pipeline is arranged on the fort ridge. The water outlet end of the inspection well is provided with a water outlet pipe extending to the edge of the fort ridge, the extending end of the water outlet pipe is connected with the water falling pipe through a first elbow, the water falling pipe is fixed to the outer side face of the fort ridge through an anchor rod support, and the water falling pipe is connected with the downstream drainage pipeline through a second elbow. A supporting seat is arranged at the lower end of the second elbow, and the inspection well and the downstream drainage pipeline are both communicated with ventilation pipes extending out of the ground. The structure is simple, the construction difficulty is reduced, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to municipal engineering facilities, in particular to a waterfall structure suitable for high drop of outdoor rain and sewage pipes in mountainous cities. Background Art

[0002] In urban sewage and rainwater drainage pipeline projects, in order to transport water from high places to low places, drainage structures such as vertical shafts or waterfalls are often set up in the drainage pipeline system. For areas with complex and changeable terrain and large elevation differences such as mountainous cities, outdoor gravity flow drainage pipelines usually need to be treated with drop height differences. Existing outdoor gravity flow drainage pipelines often use waterfalls to connect the height difference of upstream and downstream pipelines. In addition to connecting the height difference of upstream and downstream pipelines, another important function of waterfalls is to dissipate energy and stabilize flow to prevent excessive scouring of downstream pipelines.

[0003] The existing practice of waterfall wells usually refers to the current national standard atlas "Reinforced Concrete and Brick Drainage Inspection Wells" (atlas number 20S515). According to the atlas, the maximum depth of the waterfall well chamber can be 6.75m. However, for some special terrains, such as fortress ridges, the height difference between the upstream and downstream outdoor floors can reach more than 10m, which exceeds the scope of the atlas. On the other hand, when encountering special terrain such as fortress ridges, if conventional waterfall wells are used, only ultra-deep waterfall wells can be used, as follows Figure 1 However, ultra-deep waterfalls will lead to unstable embankment structures, inconvenient maintenance, and waste of construction costs. Summary of the invention

[0004] The utility model aims to address the deficiencies of the prior art and provide a waterfall structure suitable for high drop of outdoor rain and sewage pipes in mountainous cities, which has a simple structure, reduces construction difficulty and reduces construction cost.

[0005] The technical solution adopted by the purpose of the utility model is:

[0006] A drop water structure suitable for high-drop outdoor rain and sewage pipes in mountainous cities, comprising an upstream drainage pipe located at the upper end of a sill and a downstream drainage pipe located at the lower end of the sill, and also comprising a drop pipe. The sill is provided with an inspection well connected to the upstream drainage pipe, the water outlet end of the inspection well is provided with an outlet pipe extending to the edge of the sill, the extended end of the outlet pipe is connected to the drop pipe through a first elbow, the drop pipe is vertically fixed to the outer side of the sill through an anchor bracket, the drop pipe is connected to the downstream drainage pipe through a second elbow, the lower end of the second elbow is provided with a support seat, and the inspection well and the downstream drainage pipe are both connected with a ventilation pipe extending out of the ground.

[0007] Furthermore, the water outlet pipe, the drop pipe, the first elbow, the second elbow and the downstream drainage pipe are all made of metal pipes and are welded and fixed into one.

[0008] Furthermore, the first elbow and the second elbow are both 90° elbows.

[0009] Furthermore, the support seat adopts a concrete pier.

[0010] Furthermore, the ventilation pipe extends upward along the drop pipe and discharges more than 2.5m above the ground.

[0011] Furthermore, the upstream drainage pipe and the downstream drainage pipe are arranged obliquely.

[0012] The above technical solution has the following beneficial effects:

[0013] The utility model has a simple structure. The water drop structure adopts the open installation of the water drop pipe to drop water, avoiding the use of ultra-deep water drop inspection wells under high drop conditions, and is suitable for the design of outdoor rain and sewage pipes in mountainous cities. The water drop pipe is fixed with an anchor bracket, which effectively prevents the pipe from shaking. By setting a vent pipe in the inspection well and on the downstream drainage pipe, the problem of sudden changes in air pressure in the drainage pipe system caused by the rapid drop of water flow in the water drop pipe is effectively solved, ensuring drainage efficiency. Therefore, the utility model reduces the construction difficulty and reduces the cost.

[0014] The outlet pipe, the drop pipe, the first elbow, the second elbow and the downstream drainage pipe are all made of metal pipes, which are welded and fixed into one body, thereby improving the anti-scouring ability of the pipe.

[0015] The support seat adopts concrete piers, which can ensure that the drop pipe remains stable under the impact of hydraulic pressure and improve the impact resistance.

[0016] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of an existing ultra-deep waterfall well;

[0018] Figure 2 It is a structural schematic diagram of specific embodiment 1.

[0019] In the attached drawings, 1 is a dam, 2 is an upstream drainage pipe, 3 is a downstream drainage pipe, 4 is a drop pipe, 5 is an inspection well, 6 is a water outlet pipe, 7 is a first elbow, 8 is a second elbow, 9 is a support seat, and 10 is a vent pipe. DETAILED DESCRIPTION Specific embodiment 1:

[0021] See also Figure 2As shown, a water drop structure suitable for outdoor rainwater and sewage pipes with high drop in mountainous cities includes an upstream drainage pipe 2 located at the upper end of a sill 1, a downstream drainage pipe 3 located at the lower end of the sill and a water drop pipe 4. The sill 1 is provided with an inspection well 5 connected to the upstream drainage pipe 2. The inspection well adopts a common inspection well, and a step is provided in the inspection well. The inspection well mouth is provided with a manhole cover. The water outlet end of the inspection well 5 is provided with an outlet pipe 6 extending to the edge of the sill. The extended end of the outlet pipe 6 is connected to the water drop pipe 4 through a first elbow 7. The water drop pipe 4 is vertically fixed to the outer side of the sill 1 through multiple anchor brackets. The water drop pipe should be set vertically, which is not beautiful compared to the inclined water drop pipe, and will cause the concrete support pier at the lower end to bear poor force. In this specific embodiment, the water drop pipe 4 is vertically fixed to the outer side of the sill 1 through three anchor brackets. The water drop pipe 4 is connected to the downstream drainage pipe 3 through a second elbow 8. The lower end of the second elbow 8 is provided with a support seat 9, and the support seat 9 adopts a concrete support pier. The diameter of the water drop pipe 4 is the same as that of the upstream drainage pipe 2 and the downstream drainage pipe 3. The inspection well 5 and the downstream drainage pipe 3 are both connected with a vent pipe 10 extending out of the ground, and the diameter of the vent pipe 10 is DN100. The vent pipe 10 on the downstream drainage pipe 3 is set along the water drop pipe, fixed beside the water drop pipe, and extends upward to discharge more than 2.5m above the ground. The vent pipe 10 of the inspection well 5 is led to the wall, and extends upward against the wall to discharge more than 2.5m above the ground.

[0022] The outlet pipe 6, the drop pipe 4, the first elbow 7, the second elbow 8 and the downstream drainage pipe 3 are all made of metal pipes. The first elbow 7 and the second elbow 8 are both 90° elbows.

[0023] The upstream drainage pipe 2 and the downstream drainage pipe 3 are arranged at an inclination, and the slope is determined according to the calculation of the drainage volume to ensure the gravity flow of sewage (or rainwater).

[0024] Possibly, the downstream drainage pipe 3 can be converted into a plastic pipe after a certain length of metal pipe is set. Since the plastic pipe has poor anti-scouring ability, the metal pipe section of the downstream drainage pipe is welded and fixed to the second elbow 8, and the setting length of the metal pipe section is at least 3-5m.

[0025] The utility model adopts a drop pipe and two 90° elbows to replace the super-deep drop well. The upstream drainage pipeline only needs to use an ordinary inspection well. The drop structure adopts a drop pipe for dropping water, avoiding the use of super-deep drop inspection wells under high drop conditions. It is suitable for the design of outdoor rain and sewage pipes in mountainous cities.

Claims

1. A waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities, comprising an upstream drainage pipe located at the upper end of the embankment and a downstream drainage pipe located at the lower end of the embankment, characterized in that: It also includes a drop pipe, an inspection well connected to the upstream drainage pipe is provided on the sill, the water outlet end of the inspection well is provided with an outlet pipe extending to the edge of the sill, the extended end of the outlet pipe is connected to the drop pipe through a first elbow, the drop pipe is vertically fixed to the outer side of the sill through an anchor bracket, the drop pipe is connected to the downstream drainage pipe through a second elbow, the lower end of the second elbow is provided with a support seat, and the inspection well and the downstream drainage pipe are both connected to a ventilation pipe extending out of the ground.

2. The waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities according to claim 1 is characterized by: The outlet pipe, the drop pipe, the first elbow, the second elbow and the downstream drainage pipe are all made of metal pipes and are welded and fixed into one body.

3. The waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities according to claim 1 or 2, characterized in that: The first elbow and the second elbow are both 90° elbows.

4. The waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities according to claim 1 is characterized in that: The support seat adopts a concrete pier.

5. The waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities according to claim 1 is characterized in that: The vent pipe extends upward along the drop pipe and discharges above 2.5 m above the ground.

6. The waterfall structure suitable for outdoor rain and sewage pipes with high drop in mountainous cities according to claim 1 is characterized by: The upstream drainage pipe and the downstream drainage pipe are arranged obliquely.

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