CN201353443Y - A hydraulic control box culvert with double holes and equal outflow pressure - Google Patents

Abstract

A hydraulic control double hole equivalent outflow pressure box culvert relates to a hydraulic pressure box culvert, in particular to a hydraulic control double hole equivalent outflow pressure box culvert, which belongs to the technical field of water feeding and discharging. The hydraulic control double hole equivalent outflow pressure box culvert comprises an upper layer box culvert, a bottom part box culvert and a conflux well, wherein the upper layer box culvert is arranged on one side of the conflux well, the bottom part box culvert is arranged under the upper layer box culvert and the conflux well, the conflux well and the bottom layer box culvert are provided with water through holes which are communicated, a cylindrical shape with an opening on one end is arranged on the bottom layer box culvert, and a bottom slope is arranged on the bottom layer box culvert close to the lower bottom surface on one sealed end. The utility model provides the hydraulic control double hole equivalent outflow pressure box culvert, solves the defects of high device maintenance expense, trivial operation management and the like due to equivalent distribution of water stream of a traditional box culvert (or pipeline) and a control valve thereof.

Description

A hydraulic control box culvert with double holes and equal outflow pressure

technical field

The utility model relates to a hydraulic pressure box culvert, in particular to a hydraulically controlled double-hole equal-flow pressure box culvert, which belongs to the technical field of water supply and drainage.

Background technique

With the expansion of city scale, the rapid increase of urban population and the rapid development of economy, the consumption of industrial and domestic water continues to increase, and the amount of sewage produced is also increasing. important factor for sustainable development. On July 1, 2003, the "Pollutant Discharge Standards for Urban Sewage Treatment Plants" promulgated by the State Environmental Protection Administration came into effect. In order to meet the new sewage treatment requirements and improve sewage treatment capacity, many sewage treatment plants urgently need to be upgraded, expanded, etc. . In order to save resources and save investment, the sewage treatment plant often controls the new construction land as much as possible during the reconstruction and expansion process, and at the same time, on the basis of meeting the new sewage treatment requirements Remodel and expand. In the reconstruction and expansion project of the sewage treatment plant, the sewage of the high-efficiency sedimentation tank (primary treatment) is often evenly distributed, and then fully mixed with the sewage of some biological reaction tanks (secondary treatment), and then advanced treatment (such as ultraviolet disinfection, etc.) In order to meet the new control requirements of urban emission standards. When different water quality flows are mixed, it is necessary to control each flow within a certain range to meet the capacity requirements of the subsequent treatment structures and ensure the safety of the subsequent treatment structures. At present, my country's sewage treatment plants often use water delivery box culverts (or pipelines) and their control valves to distribute sewage in equal amounts to meet the requirements of equal mixing of different water qualities and flows, which requires operation and management of gates and daily equipment maintenance. However, there is no structural type that adopts the variable cross-section pressure box culvert with double holes and equal flow under hydraulic control conditions to realize automatic equal flow.

Contents of the invention

Technical problem to be solved:

The utility model provides a hydraulically controlled double-hole equal-flow pressure box culvert, which solves the defects of high equipment maintenance costs and cumbersome operation and management existing in the traditional box culvert (or pipeline) and its control gates for equal water flow distribution.

Technical solutions:

The box culvert with hydraulically controlled double-hole equal flow pressure includes the upper box culvert, the bottom box culvert, and the confluence well; There is a water hole connected to the bottom box culvert, the bottom box culvert is cylindrical with one end open, and the bottom surface of the bottom box culvert close to the closed end is provided with a bottom slope.

In the hydraulically controlled double-hole equal-flow pressure box culvert described in the utility model, a cushion layer is arranged on the lower end surface of the above-mentioned bottom box culvert.

In the hydraulically controlled double-hole equal outflow pressure box culvert described in the utility model, the above-mentioned bottom slope angle and side slope ratio is i=1:4.

Beneficial effect:

It realizes equal hydraulic diversion and mixing of water flows of different water quality using the surplus water head, without the need for other devices such as control valves and external force operation, and can be widely used in water supply and drainage projects, and realizes the goal of equal diversion of sewage in sewage treatment plant reconstruction and expansion projects Control and improve the efficiency of advanced treatment structures and urban sewage treatment rate. The pressure box culvert has a simple structure, a simple process flow, no other energy sources, low material requirements, and low manufacturing cost.

Description of drawings

Fig. 1 is the structural representation of the utility model.

FIG. 2 is a top view of FIG. 1 .

Specific examples:

Below in conjunction with accompanying drawing description, the utility model is described in further detail:

The box culvert with hydraulically controlled double-hole equal flow pressure includes the upper box culvert 1, the bottom box culvert 2, and the confluence well 3; The bottom box culvert 2 is set, and a water passage hole connected between the confluence well 3 and the bottom box culvert 2 is provided. The bottom box culvert 2 is cylindrical with one end open, and the bottom surface of the bottom box culvert 2 near the closed end is provided with a bottom slope 6 . A cushion layer 5 is provided on the lower end surface of the above-mentioned bottom box culvert 2 . The slope ratio of the bottom slope 6 is i=1:4.

1 in the figure refers to the upper box culvert, which has a rectangular cross-section and is arranged on one side of the confluence well; 2 refers to the bottom box culvert, which is a variable-section column with one end open, and a bottom slope is set on the lower bottom near the closed end; 3 is Refers to the confluence well, which is a cylinder with an open upper end, connecting the upper box culvert 1 and the bottom box culvert 2, and there is a water hole connected to the bottom box culvert 2; 4 refers to the water hole, which is the bottom box culvert 2 5 refers to the cushion layer, which is the lower structure of the lower variable section of the bottom box culvert 2; 6 refers to the bottom slope, which is the slope set on the bottom surface of the bottom box culvert 2 close to the closed end .

H in the figure refers to the clear height of the box culvert at the end of the bottom box culvert 2 close to the water inlet; h ₁ refers to the thickness of the lower bottom cushion of the bottom box culvert 2 near the closed end; h ₂ refers to the bottom box culvert 2 close to the closed end The net height of the box culvert; L refers to the length of the bottom slope section of the bottom box culvert 2; B refers to the width of the upper box culvert and the bottom box culvert.

In the figure, the water quality of A refers to the sewage treated by the biochemical reaction tank of the sewage treatment plant; the water quality of _B refers to the sewage treated by the high-efficiency sedimentation tank of the sewage treatment plant; tons/day); Q flow refers to the capacity corresponding to 3-4 high-efficiency sedimentation tanks (10,000 tons/day).

In actual operation, the water quality is different, divided into water quality A and water quality B. The upper box culvert is divided into left and right sides to enter water, and the inflow rate at each end is Q ₁ (water quality A); the bottom box culvert enters water from the left end, and the inflow rate is Q (B water quality). The main structure of the hydraulically controlled double-hole equal-flow pressure box culvert is in the equal-flow diversion section, and the structure type is a rectangular pressure box culvert with variable cross-section. A The water inflow Q ₁ flows from the left and right sides of the upper box culvert to the confluence well respectively. The cross-section of the pressure box culvert is a rectangular box culvert with equal cross-section. The clear width and clear height of the box culvert are mainly determined according to the incoming water volume and the economical design flow rate . B water quality inflow Q flows from the left side of the bottom box culvert to the equal distribution section. Before the equal distribution section, it is a rectangular pressure box culvert with equal section width B and clear height H. The clear width and clear height of the box culvert are mainly based on Determine the size of the water volume and the economical design flow rate; set a slope with a length of L and a bottom slope of i in the equal volume diversion section to reduce the flow section, and reduce the section of the rectangular pressure box culvert to the net width B after the equal volume diversion section and net height h ₂ ; set confluence wells in appropriate areas before and after the equal diversion section, and set water distribution holes at the corresponding confluence well positions for the bottom box culvert and the upper box culvert.

Claims (3)

1, a kind of waterpower control diplopore etc. measures the flowing pressure box culvert, it is characterized in that: comprise upper strata box culvert (1), bottom box culvert (2), junction box (3); Upper strata box culvert (1) is arranged on a side of junction box (3), upper strata box culvert (1) is provided with bottom box culvert (2) with the below of junction box (3), be provided with the limbers (4) that communicates between junction box (3) and the bottom box culvert (2), bottom box culvert (2) is the cylindricality of an end opening, and bottom box culvert (2) is provided with base slope (6) near the bottom surface of sealing one end.

2, waterpower according to claim 1 control diplopore etc. measures the flowing pressure box culvert, and it is characterized in that: the lower surface of above-mentioned bottom box culvert (2) is provided with bed course (5).

3, waterpower according to claim 1 control diplopore etc. measures the flowing pressure box culvert, and it is characterized in that: above-mentioned base slope (6) side slope is than being i=1: 4.

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