CN203866950U - Drainage four-way inspection well for preventing water flow opposite flowing - Google Patents

Abstract

The utility model discloses a drainage four-way inspection well for preventing water flow opposite flowing, belongs to the field of drainage projects and particularly relates to a drainage ditch building used for rainwater and sewage convergence and suitable for an intersected inspection well for a rainwater or sewage pipeline. Branch pipes on two sides of the sewage pipeline are connected to the inspection well and provided with flowing grooves with large turning radius, the flowing grooves of the branch pipes on two sides are separated from an upstream pipeline flowing groove, and an included angle formed by three convergent flowing grooves is small. The drainage four-way inspection well can prevent water flow opposite flowing of the inspection well, decrease turbulent flows, enable water flows to be stable, fully play a drainage efficiency role on the intersected inspection well and accordingly decrease urban road water-logging phenomena.

Description

Prevent the draining four-way manhole of opposite jet flow

Technical field

The utility model relates to a kind of draining four-way manhole that prevents opposite jet flow, belongs to drainage works field, the drainage structures that particularly rainwater, sewage conflux.

Background technology

City rainwater drainage is all generally functional in organized water drainage, and the rainwater on ground drains into storm sewer by runoff gathering, then enters natural water by For Stormwater Drainage System.Urban rainwater pipeline system great majority are to lay under road, and urban road intersects in length and breadth, and the unit of road both sides or the rainwater of residential community access urban rainwater pipeline are all by three-way inspection well or the access of four-way manhole.In the time carrying out urban rainwater pipeline design, designer applies mechanically standard drawing.The four-way manhole of existing national standard drawing " 06MS201 municipal administration drainage channel project and ancillary facility ", branch diameter and supervisor's caliber be hour employing circular inspection well, arm and downstream supervisor adopt the access downstream of 90 °～135 °, pipe with small pipe diameter drainage inspection well flow reduces, and four-way access is little on the impact of current.In the time of supervisor's caliber 900～2000mm, should adopt rectangle four-way manhole, in standard drawing, rectangle four-way manhole chute is very little, two side branch vis-a-vis and upstream supervisor are 90 ° and join, the opposite jet flow of two side branch, cross and form very strong turbulent flow with upstream supervisor's current, even if downstream supervisor is according to upstream supervisor and two side branch flow design, because local head loss is larger, the water that imports manhole can not be effectively discharged to downstream line, especially when the arm gradient in one or both sides is larger, arm flow rate of water flow is larger, turbulent flow phenomenon is even more serious, therefore, often there is the draining of four-way manhole not as good as waterlogging occurs in heavy rain or rainstorm weather in Practical Project, and the not phenomenon of flowing full of downstream line.The three-way inspection well that also has a kind of " T " word to join, pipeline is collected to a bit along relative direction, then to the downstream drain of vertical direction, is generally to adopt the four-way manhole of standard drawing to cancel upstream supervisor, and this three-way inspection well turbulent flow phenomenon is also very serious." impact of rainwater inspection well local losses on storm-water system conveyance capacity " (the 20th phase of " Chinese water supply and drainage " October in 2010) literary composition of Lin Jinhai, manhole local losses is affected to discharge capacity and be studied, the actual discharge capacity that the local losses of manhole causes only can reach 60%～80% of design discharge.

Existing standard drawing rectangle four-way manhole, the turning radius at two side branch chute centers is only 1.5 times of left and right of caliber, according to hydraulics requirement, the turning radius of pipe duct should be caliber or width of the channel 2.5～5.0 times, less turning radius is unfavorable for the discharge of current, and this is also one of reason that prior art four-way manhole drainage efficiency is low.

Summary of the invention

The purpose of this utility model is to provide a kind of draining four-way manhole that prevents opposite jet flow, is applicable to the manhole that crosses of rainwater or sewage conduct.Two side branch access manholes adopt the larger chute of turning radius, and two side branch chutes and upstream chute are spaced, and the angle of the remittance of three chutes is less.Beneficial effect is: the defect that has overcome prior art four-way drainage inspection well and easily form opposite jet flow, can prevent from entering the opposite jet flow of manhole, reduce turbulent flow and make water flow stationary, give full play to the drainage efficiency of the manhole that crosses, thereby reduce the generation of urban road waterlogging.

The utility model is realized by following technology: the described draining four-way manhole that prevents opposite jet flow, mainly comprises well body 1, charge for remittance chute 2, upstream chute 3, left side chute 4, right side chute 5, isolation platform 6.Both sides branch drain and upstream supervisor imports after manhole discharged to downstream line, the pipeline of three directions in upstream adopts chute to collect, between left side chute 4, right side chute 5 and upstream chute 3, be isolated platform 6 and separate, the angle α that left side chute 4, right side chute 5 access charge for remittance chute 2 places and upstream chute 3 is the acute angle of 15 °～30 °.Summit between the isolation corresponding upstream of platform 6 chute 3 and left side chute 4 and right side chute 5 exceeds 50～200 millimeters than the mouth of pipe of a corresponding side, isolation platform 6 apical side heights are than rising out 50～100 millimeters in pipeline, the effect of isolation platform 6 is to intercept the relative mouth of pipe in both sides, can effectively prevent opposite jet flow.Three strands of current of upstream collect downstream mutually with less angle, are conducive to the unobstructed turbulent flow that reduces of current.2.5 times of turning radius R >=its caliber of left side chute 4, right side chute 5, can make current smooth and easy steadily, reduce local head loss.Described charge for remittance chute 2 can substitute with chute pipe fitting 21, be arranged in well body 1, upstream chute 3, left side chute 4, right side chute 5 can use respectively upstream straight tube 31, left side bend pipe 41, right side bend pipe 51 to substitute, be arranged on outside well body 1, the interface corresponding with chute pipe fitting 21 is connected respectively, the size of well body 1 can be dwindled greatly, goes back constructability.The draining four-way manhole that prevents opposite jet flow has improved flow condition by above-mentioned three kinds of measures, improves the drainability of four-way manhole, reduces the generation of waterlogging.

Brief description of the drawings

Fig. 1 is that the utility model is built type four-way manhole plan view by laying bricks or stones;

Fig. 2 is the A-A sectional drawing of Fig. 1;

Fig. 3 is the B-B sectional drawing of Fig. 1;

Fig. 4 is the utility model pipe fitting type four-way manhole plan view;

Fig. 5 is the C-C sectional drawing of Fig. 4;

Fig. 6 is the D-D sectional drawing of Fig. 4;

Fig. 7 is the E-E sectional drawing of Fig. 4;

Fig. 8 is the utility model pipe fitting assembling schematic diagram.

In figure: 1-well body, 2-charge for remittance chute, 3-upstream chute, 4-left side chute, 5-right side chute, 6-isolates platform, 7-downstream line, 8-upstream line, 9-left side arm, 10-right side arm, 11-workbench, 12-well head, 21-chute pipe fitting, 31-upstream straight tube, 41-left side bend pipe, 51-right side bend pipe.

Detailed description of the invention

It is the acute angle of 15 °～30 ° that enforcement of the present utility model should be controlled the arm chute of both sides and upstream supervisor's chute angle α, isolation platform summit between chute should exceed the corresponding mouth of pipe, isolation countertop exceeds top in pipeline, 2.5 times of two side branch chute turning radius R >=its calibers.Four-way well can adopt brick or steel concrete to build well body and chute, also can adopt HDPE high-density polyethylene material to make chute and pipe fitting, and site assembly chute is built well body again by laying bricks or stones.

Embodiment mono-: build type four-way manhole plan view by laying bricks or stones and see Fig. 1, according to the caliber of downstream line 7, upstream line 8, left side arm 9, right side arm 10, and the angle α of arm access is, radius R is determined each spot size, in the pipeline pipe of four direction, top flushes up and down, and in the pipeline of water inlet, outlet pipe, top is equally high.Increase the size that angle α can reduce manhole, but flow condition variation thereupon, the angle α in Fig. 1 is 20 °.Well body 1 adopts brick, well body 1 the knuckle at downstream line 7, left side arm 9, right side arm 10 places apart from the distance on internal diameter of the pipeline limit should >=150mm.Isolation platform 6 and workbench 11 adopt formwork concreting, charge for remittance chute 2, upstream chute 3, left side chute 4, and right side chute 5 should be smoother level and smooth.Fig. 2 is the A-A sectional drawing of Fig. 1, i.e. manhole appropriate department's vertical section, if upstream line 8 is less than the caliber of downstream line 7, charge for remittance chute 2 should adopt slope along connecing.Fig. 3 is the B-B section of Fig. 1, it is the cross section at manhole arm place, isolation platform 6 separates upstream chute 3 and left side chute 4 and right side chute 5, summit between the isolation corresponding upstream of platform 6 chute 3 and left side chute 4 and right side chute 5 exceeds 50～200 millimeters than the mouth of pipe of a corresponding side, isolation platform 6 intercepts the relative mouth of pipe in both sides, can effectively prevent opposite jet flow.Isolation platform 6 is consistent with workbench 11 apical side heights, and than rising out 50～100 millimeters in pipeline, isolation platform 6 and workbench 11 are convenient to servant and are dredged maintenance and use.According to the size base area area load design cover plate of well body 1, well head 12 is set on cover plate.

Embodiment bis-: the draining four-way manhole that prevents opposite jet flow is except the type of building by laying bricks or stones, also chute can be made into plastic pipe, charge for remittance chute 2 can substitute with chute pipe fitting 21, be arranged in well body 1, upstream chute 3, left side chute 4, right side chute 5 can use respectively upstream straight tube 31, left side bend pipe 41, right side bend pipe 51 to substitute, be arranged on outside well body 1, the interface corresponding with chute pipe fitting 21 is connected respectively, and the size of well body 1 can be dwindled greatly.Two side branch and upstream supervisor adopt pipe fitting isolation to import manhole with less angle, and flow condition is good, and well body size is relatively little, easy construction.Fig. 4 is shown in by pipe fitting type four-way manhole plan view, and two side branch chutes adopt bend pipe to replace, and have saved isolation platform 6.Chute pipe fitting 21, upstream straight tube 31, left side bend pipe 41, right side bend pipe 51 adopt high density polyethylene (HDPE) (HDPE) material to make, the radius >=2.5 times caliber at left side bend pipe 41, right side bend pipe 51 centers.Chute pipe fitting 21 is made into one with the bellmouth that is connected upper and lower, left and right pipe fitting, and pipe top flushes.When construction, adopt brick that four interface tubes are built by laying bricks or stones on well body 1 according to design plane position and elevation chute pipe fitting 21, adopt concreting workbench 11, chute pipe fitting 21 is fixed in well body 1 by concrete, according to the size base area area load design cover plate of well body 1, well head 12 is set on cover plate.Pipe fitting type four-way manhole plan view is shown in Fig. 5, Fig. 6, Fig. 7.Fig. 5 is the C-C section of Fig. 4, i.e. manhole appropriate department's vertical section, the D-D section that Fig. 6 is Fig. 4, the drawing in side sectional elevation that manhole is seen to pipeline upstream, the E-E section that Fig. 7 is Fig. 4, the drawing in side sectional elevation that manhole is seen to pipe downstream.Upstream straight tube 31, left side bend pipe 41, right side bend pipe 51 are connected with chute pipe fitting 21 and adopt socket joint rubber gasket or hot melt interface, being connected of being connected of upstream line 8 and upstream straight tube 31, left side arm 9 and left side bend pipe 41, right side arm 10 and right side bend pipe 51 to be connected pattern definite according to pipeline material.Upstream straight tube 31, left side bend pipe 41, right side bend pipe 51 can be made into the eccentric reducer part of Guan Dingping, and the bellmouth of chute pipe fitting 21 is made into conventional caliber, adjust by reducer pipe with a small amount of bellmouth specification, reduce the specification of chute pipe fitting 21 interfaces.Fig. 8 is pipe fitting assembling schematic diagram.

Claims (4)

1. one kind prevents the draining four-way manhole of opposite jet flow, mainly comprise well body (1), charge for remittance chute (2), upstream chute (3), left side chute (4), right side chute (5), workbench (6), it is characterized in that: between described left side chute (4), right side chute (5) and upstream chute (3), be isolated platform (6) and separate, it is the acute angle of 15 °～30 ° that left side chute (4), right side chute (5) access charge for remittance chute (2) is located with the angle α of upstream chute (3).

2. the draining four-way manhole that prevents opposite jet flow according to claim 1, it is characterized in that: the summit between described isolation platform (6) corresponding upstream chute (3) and left side chute (4) and right side chute (5) exceeds 50～200 millimeters than the mouth of pipe of a corresponding side, isolation platform (6) apical side height is than rising out 50～100 millimeters in pipeline.

3. the draining four-way manhole that prevents opposite jet flow according to claim 1, is characterized in that: described left side chute (4), turning radius R >=its caliber of right side chute (5) 2.5 times.

4. the draining four-way manhole that prevents opposite jet flow according to claim 1, it is characterized in that: described charge for remittance chute (2) can substitute with chute pipe fitting (21), be arranged in well body (1), upstream chute (3), left side chute (4), right side chute (5) can use respectively upstream straight tube (31), left side bend pipe (41), right side bend pipe (51) to substitute, and are arranged on outside well body (1).