CN212224120U - Cut-off system - Google Patents
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- CN212224120U CN212224120U CN202020978789.9U CN202020978789U CN212224120U CN 212224120 U CN212224120 U CN 212224120U CN 202020978789 U CN202020978789 U CN 202020978789U CN 212224120 U CN212224120 U CN 212224120U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 120
- 239000010865 sewage Substances 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims abstract description 29
- 238000007599 discharging Methods 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 40
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- 238000005070 sampling Methods 0.000 claims description 6
- 239000012530 fluid Substances 0.000 claims 2
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- 238000004364 calculation method Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 230000005484 gravity Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
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- 230000008569 process Effects 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 239000013618 particulate matter Substances 0.000 description 1
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- 238000012372 quality testing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000009419 refurbishment Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
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Abstract
The utility model provides a system dams, the system includes: the top end of the intercepting well is provided with a water inlet, the bottom end of the intercepting well is provided with an intercepting water outlet, the side wall of the intercepting well is respectively provided with an overflow discharge port and a water outlet connected with the regulating and storing tank, and the height of the water outlet is lower than that of the overflow discharge port; the water inlet is used for enabling sewage to enter the intercepting well, the water outlet is used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the intercepting well into the regulating and storing pool, and the overflow discharge port is used for discharging the sewage with the concentration lower than the second concentration in the intercepting well into a river channel; the intercepting well is internally provided with a first lifting pump connected with the intercepting water outlet and used for lifting the sewage with the concentration higher than the first concentration in the intercepting well to the intercepting main pipe; the regulating and storing pool is connected with the intercepting well through a water outlet, and a flow-limiting discharge port is arranged on the side wall of the regulating and storing pool and used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the regulating and storing pool to the intercepting main pipe; and a second lifting pump is arranged in the storage tank and used for emptying the storage tank. The water quality concentration of the intercepted water is improved, and the load of entering the river is reduced.
Description
Technical Field
The utility model relates to a technical field that dams especially relates to a system of damming.
Background
In rainy days, the existing drainage system often produces overflow at the tail end of a pipe network or along a river drainage port, so that an intercepting well can be built at the tail end of a drainage pipe to intercept initial rainwater. Most rainfall conditions can have the phenomenon of initial scouring, namely the initial rainwater concentration is higher, and the later rainwater concentration is lower. However, due to the difference of the upstream and downstream catchment time and the limited flow capacity of the intercepting main pipe, the problems of high interception multiple of the catchment area at the near end of the intercepting well and low interception multiple of the catchment area at the far end of the upstream are caused. Therefore, a large amount of later stage rainwater with lower water quality concentration can be intercepted under the above conditions, and a large amount of initial stage rainwater with higher concentration directly drains into the river channel.
At present, there are some related patents directed to the flow restriction of a vatch well. However, the existing patent mainly relates to a facility for controlling the rain and sewage mixing interception amount, and a system design method for reasonably determining the flow limiting amount and the pipe diameter of the flow limiting pipe through theoretical research is not available. For example, a utility model named "a flow-intercepting and flow-limiting system" (application No. CN201710304580.7, publication No. CN106894499A) proposes to use a flow-limiting plate to limit the flow, and the main purpose of the flow-limiting plate is to limit the flow-intercepting amount of a combined pipe network with high reconstruction cost, so as to intercept domestic sewage, not rainwater. However, this solution is limited to a small amount of shutoff and is prone to blockage due to the presence of a large amount of particulate matter in the pipeline. Meanwhile, rainwater and sewage are not considered to be mixed together in rainy days, and a large amount of pollutants still enter a river channel under the intercepting and flow-limiting system. For another example, a utility model named "a sewage intercepting well with an adjustable sewage interception multiple" (application No. CN201920788634, publication No. CN210134509U) adjusts the interception multiple of the intercepting well according to the number of the inserted orifice plates and the size of the orifice holes by providing a flow restriction orifice plate, but does not consider intercepting the initial rainfall with high pollution load. For another example, a utility model named "a system for intercepting water" (application number: CN201810708593.5, publication number: CN108775066A) mainly realizes the control of the intercepting multiple by controlling the opening and closing of the valves between a plurality of intercepting wells and a storage tank, thereby avoiding the problem that the amount of water intercepted at the upstream is less than that intercepted at the downstream. However, the operation is complex, and the operation mode is different under different rainfall conditions, which is difficult to be applied in practice.
Therefore, in the prior art, a large amount of later stage rainwater with lower water quality concentration is intercepted, and a large amount of initial stage rainwater with higher concentration directly enters a river channel.
The above background disclosure is only provided to aid in understanding the concepts and technical solutions of the present invention, and it does not necessarily belong to the prior art of the present patent application, and it should not be used to assess the novelty and inventive step of the present application without explicit evidence that the above content has been disclosed at the filing date of the present patent application.
Disclosure of Invention
The utility model discloses a solve current problem, provide a system dams.
In order to solve the above problem, the utility model discloses a technical scheme as follows:
a flow shutoff system, comprising: the system comprises a catch basin and a regulation and storage pool, wherein the catch basin is positioned at the upstream of the regulation and storage pool, and sewage firstly enters the catch basin; the top end of the intercepting well is provided with a water inlet, the bottom end of the intercepting well is provided with an intercepting water outlet, the side wall of the intercepting well is respectively provided with an overflow discharge port and a water outlet connected with the regulating and storing tank, and the water outlet is arranged at a height lower than that of the overflow discharge port; the water inlet is used for enabling sewage to enter the intercepting well, the water outlet is used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the intercepting well into the regulating and storing pool, and the overflow discharge outlet is used for discharging the sewage with the concentration lower than the second concentration in the intercepting well into a river channel; a lifting pump connected with the intercepting water outlet is arranged in the intercepting well and used for lifting the sewage with the concentration higher than the first concentration in the intercepting well to an intercepting main pipe; the first concentration and the second concentration are preset and the first concentration is greater than the second concentration; the regulating and storing pool is connected with the intercepting well through the water outlet, and a flow-limiting discharge port is arranged on the side wall of the regulating and storing pool and used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the regulating and storing pool to the intercepting main pipe; and a lifting pump is arranged in the storage tank and used for emptying the storage tank.
Preferably, the flow-limiting discharge port is provided with a flow-limiting discharge valve and is connected with a flow-limiting pipe, and the flow-limiting pipe is connected with the intercepting main pipe.
Preferably, the position of the flow-limiting discharge port is determined by the highest liquid level in the storage tank, the pipe diameter of the flow-limiting pipe and a preset flow-limiting amount.
Preferably, the overflow drain port and the water outlet are both provided with valves, and the valves are electrically operated valves.
Preferably, a flowmeter is arranged at the joint of the intercepting water outlet and the intercepting main pipe; and a flowmeter is arranged at the joint of the flow-limiting discharge port and the intercepting main pipe.
Preferably, a water quality meter is arranged in the intercepting well and used for detecting the quality of sewage in the intercepting well.
Preferably, at least one sludge storage hopper is arranged in the intercepting well and used for storing sludge.
Preferably, a liquid level meter is arranged in the intercepting well and/or the storage tank and used for measuring the liquid level.
Preferably, an automatic sampling device is arranged in the intercepting well and used for sampling sewage in the intercepting well.
The utility model has the advantages that: the utility model provides a system of damming, through setting up in the regulation pond that has the current-limiting discharge port of vatch basin mating reaction, bring rainy day runoff quality of water into the consideration within range of system design of damming, improved the effect of damming to a certain extent, under the same circumstances of total volume of damming, improved the quality of water concentration of damming, reduced the load of going into the river.
Drawings
Fig. 1 is a schematic view of a flow interception system according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a method for intercepting a flow in an embodiment of the present invention.
Fig. 3 is a schematic diagram of the basic pipe network data and the topological relation thereof in the embodiment of the present invention.
Fig. 4 is a schematic diagram of a regulated reservoir with a restricted flow discharge in an embodiment of the invention.
Fig. 5 is a schematic view of another embodiment of the present invention.
The system comprises a water inlet, a water outlet, an overflow discharge outlet, a valve of the overflow discharge outlet, a 4-cut-off water outlet, a 5-first lift pump, a 6-water outlet, a valve of the water outlet, a 7-water outlet, a 8-second lift pump, a 9-flow-limiting discharge valve, a 10-flow-limiting discharge outlet, an 11-12-online water quality detecting instrument, a 13-cut-off dry pipe, a 14-first cut-off well, a 15-second cut-off well, a 16-third cut-off well, a 17-cut-off well, an 18-regulating storage tank, a 19-sludge storage hopper, a 20-liquid level meter and a 21-automatic sampling device.
Detailed Description
In order to make the technical problem, technical scheme and beneficial effect that the embodiment of the present invention will solve more clearly understand, the following combines the drawings and embodiment, and goes forward the further detailed description of the present invention. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element. In addition, the connection may be for either a fixing function or a circuit connection function.
It is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the embodiments of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As shown in fig. 1, the utility model provides a system dams, include: the system comprises a catch basin and a regulation and storage pool, wherein the catch basin is positioned at the upstream of the regulation and storage pool, and sewage firstly enters the catch basin;
the top end of the intercepting well is provided with a water inlet 1, the bottom end of the intercepting well is provided with an intercepting water outlet 4, the side wall of the intercepting well is respectively provided with an overflow discharge port 2 and a water outlet 6 connected with the regulating storage tank, and the height of the water outlet 6 is lower than that of the overflow discharge port 2; the water inlet 1 is used for enabling sewage to enter the intercepting well, the water outlet 6 is used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the intercepting well into the regulating and storing pool, and the overflow discharge port 2 is used for discharging the sewage with the concentration lower than the second concentration in the intercepting well into a river channel; a first lifting pump 5 connected with the intercepting water outlet 4 is arranged in the intercepting well and used for lifting the sewage with the concentration higher than the first concentration in the intercepting well to an intercepting main pipe 13; the first concentration and the second concentration are preset, and the first concentration is greater than the second concentration;
the regulation and storage tank is connected with the intercepting well through a water outlet 6, and a flow-limiting discharge port 10 is arranged on the side wall and is used for discharging sewage, of which the concentration is higher than the second concentration and lower than the first concentration, in the regulation and storage tank to an intercepting main pipe 13; and a second lifting pump 8 is arranged in the storage tank and used for emptying the storage tank.
The utility model provides a system of damming, including the regulation pond that is provided with the current-limiting discharge port, compare with traditional system of damming, within the consideration scope of system design of damming is brought into to rainy day runoff quality of water, improved the effect of damming to a certain extent, under the same circumstances of total damming volume, improved the quality of water concentration of damming, reduced the load of going into the river.
In one embodiment of the present invention, the flow-limiting discharge port 10 is provided with a flow-limiting discharge valve 9 and the flow-limiting discharge port 10 is connected to a flow-limiting pipe, which is connected to a main pipe 13 for intercepting flow. The overflow discharge port 2 is provided with a valve 3, the water outlet 6 is provided with a valve 7, and the valve is an electric valve. The opening degree of the valve can be changed through remote control to adjust the flow, so that more accurate scheduling is realized.
The position of the flow-limiting discharge port 10 is determined by the highest liquid level in the regulating reservoir, the pipe diameter of the flow-limiting pipe and the preset flow-limiting amount. Because the intercepting well is connected with the storage tank through the water outlet 6 and is overflowing due to gravity, the highest liquid level in the storage tank is determined by the position of the water outlet 6, and the setting position of the water outlet 6 is lower than the pipe top elevation of the water inlet 1 and the overflowing liquid level in the intercepting well.
A flowmeter is arranged at the joint of the pipeline connected with the closure water outlet 4 and the closure main pipe 13; and a flowmeter is arranged at the joint of the flow limiting pipe connected with the flow limiting discharge port and the intercepting main pipe 13. The water quality instrument 12 is arranged at the water inlet 1, the quality of inlet water in the intercepting well is mainly detected, intercepting/flow limiting operation is needed when the inlet water concentration is higher, intercepting is stopped if the inlet water concentration is lower, the valve 7 of the water outlet 6 is closed if the inlet water concentration is in an intercepting state, the valve 3 of the overflow discharge port 2 is opened if the inlet water concentration is in a flow limiting state, and then the inlet water is directly discharged to a river channel.
The intercepting well has three drainage paths for water inflow:
(1) the sewage is discharged to a cut-off trunk pipe 13 (in sunny days and in the early stage of rainfall) through a cut-off water outlet 4 under the action of a first lifting pump 5;
(2) opening a valve 7 of a water outlet 6 to enter a storage tank (when the accumulated closure total amount reaches a design value);
(3) and opening a valve 3 of the overflow discharge port 2 to discharge the water to a river channel (the water quality concentration is low or the rainfall is too large to reach the overflow discharge liquid level).
The inlet water of the storage tank has two discharge ways:
(1) is discharged to a cut-off main pipe 13 through a flow-limiting discharge port 10 (the cut-off well inlet water quality concentration is higher)
(2) Emptying (on a sunny day or at refurbishment) is performed by means of the second lift pump 8 in the storage tank.
In an embodiment of the present invention, a mud storage hopper 19 is disposed in the intercepting well, and specifically, one or more mud storage hoppers may be disposed at corners of the intercepting well. Through using fluent to simulate the water conservancy condition in vatch basin and the regulation pond and know, the corner of vatch basin and regulation pond produces the siltation easily, consequently sets up the storage mud fill that can propose, can propose it when storing mud volume too much and transport to solid waste treatment plant.
On the basis of measuring the quality concentration of the inlet water, a liquid level meter 20 is used for measuring the liquid level in the intercepting well and/or the regulating storage tank, and the liquid level meter is arranged in the intercepting well and the regulating storage tank to control the opening and closing of the first lifting pump 5 and the second lifting pump 8, and control the opening and closing of the overflow discharge valve 2, the water outlet valve 7 and the flow-limiting discharge outlet valve 9.
When the online water quality detecting instrument 12 detects that the water inlet concentration is abnormal, the automatic sampling device 21 in the intercepting well samples the water inlet concentration so as to solve the problems of follow-up maintenance, pollution tracing and the like.
As shown in fig. 2, the present invention provides a method for intercepting a flow, which employs the intercepting system as described above, and comprises the following steps:
s1: the sewage enters the intercepting well through the water inlet and is intercepted, and when the concentration of the sewage is higher than the first concentration, the sewage with the concentration higher than the first concentration in the intercepting well is lifted to the intercepting main pipe through the intercepting water outlet; if the inlet water concentration in the intercepting well is higher than the first concentration, but the liquid level in the intercepting well reaches the overflow discharge liquid level, opening a gate of the regulating and storing pool, and if the liquid level in the intercepting well continues to rise to the overflow discharge liquid level, opening the overflow discharge gate;
s2: when the liquid level in the intercepting well rises and the sewage concentration drops to be lower than the first concentration and the transportation energy occupancy of the intercepting well is larger than the space occupancy, discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the intercepting well into the storage tank through the water outlet; the sewage in the regulation pool is discharged to the intercepting main pipe through the flow-limiting discharge port under the action of gravity, wherein the concentration of the sewage is higher than that of the second concentration water and lower than that of the first concentration water; if the inlet water concentration in the intercepting well is higher than the first concentration, but the liquid level in the intercepting well reaches the overflow discharge liquid level, closing the inlet gate of the storage regulation pool and opening the overflow discharge gate;
s3: and discharging the sewage with the concentration lower than the second concentration in the intercepting well into a river channel through the overflow discharge port when the sewage concentration in the intercepting well is reduced to be lower than the second concentration.
The utility model discloses an in the embodiment, the fortune of vatch basin can occupation rate and space occupation rate through following calculation:
first, the data of the basic pipe network of a region and the topological relation thereof should be acquired. For a cut-off system network O ═ { N, E, S }, N is a cut-off well set, N ═ 1,2 … … J }; e is an interval set, E ═ 1,2 … … J, where interval 1 is the intercepting pipe segment between intercepting well 1 and intercepting well 2 and so on, and interval J is the pipe segment between intercepting well J and the end of the intercepting pipe network; s is the service area set of the intercepting well, S ═ S1,S2…SJ}；
From the handbook of design of water supply and drainage, the rainwater flow is calculated as follows:
wherein the content of the first and second substances,
is the runoff coefficient, q is the design rainfall intensity, L/(s.hm)2) S is the water collection area in hm2；
The pipe diameter and flow design of the intercepting main pipe is the same as the design method of the rainwater pipe network, and the intercepting well needs to be limited under the condition that the designed intercepting flow is met. From the above formula, the intercepting amount of each intercepting well is related to its own service area and runoff coefficient, so when the accumulated intercepting amount of the intercepting well reaches the design value, its limited flow is also related to its own service area and runoff coefficient. Defining the proportion of the product of the service area of the intercepting well and the runoff coefficient to the sum of the product of the service area of the intercepting well and the upstream intercepting well as the runoff coefficient as a space occupancy, wherein the calculation method is as follows:
wherein S isjNamely the water collecting area S, M in the above formulajIs the space occupancy;
is the runoff coefficient of the sub-water area of the intercepting well j;
the flow rate of each intercepting well in the intercepting main pipe should therefore not be greater than its space occupancy in proportion to the total flow rate, but in practice the flow rates of different intercepting wells in the intercepting main pipe will differ from the design values. The proportion of the water volume of the intercepting well j in the total water volume of the intercepting pipe section interval j at the time t of the intercepting pipe section interval j is the transport energy occupancy, and the calculation is shown as the following formula:
in the formula, Qmax(j) For maximum flow in m of the closure pipe section j3/s，Qsj(t) is the intercepting quantity of the intercepting well j at the moment t, and the unit is m3/s。
Qmax(j) The calculation method of (2) is as follows:
Qj→j+1(t)′＝v(t)×A(t)×1000
A(t)＝(θ-Sinθ×Cosθ)×r2
R＝(θ-Sinθ×Cosθ)×r/2/(π-θ)
wherein Q isj→j+1(t)' calculating the flow in the intercepting pipe section, wherein the unit is L/s; v (t) is the flow velocity in the cut-off section in m/s; a (t) is the flow cross-sectional area in m2(ii) a R is the hydraulic radius in m; r is the radius of the cut-off pipe section in m; i is the slope of the closure segment; n is the roughness coefficient of the cut-off pipe section; theta is the included angle between the center point of the section of the intercepting pipe section and two connecting lines at the two ends of the water section.
When the online water quality detection instrument at the water inlet detects that the inlet water concentration of the intercepting well is lower than the first concentration and higher than the second concentration, X (t) is Kj(t)-MjI.e. energy in transit occupancy-space occupancy; if X (t) is less than 0, the original interception mode is maintained; otherwise, the intercepting well is subjected to current limiting control: the position that the current-limiting discharge port set up by highest liquid level in the regulation pond, the pipe diameter of restricted flow pipe and the restriction volume of presetting decide, the restriction volume of presetting does:
it is understood that the preset amount of current restriction varies according to the situation of the regional basis official network.
As can be seen from the basic pipe network data and the topological relationship thereof shown in fig. 3, the intercepting well 14, the intercepting well 15 and the intercepting well 16 together form a basic data pipe network, wherein the intercepting well 16 is taken as an example:
the calculation of the restriction pipe diameter is further explained as follows:
a regulation and storage pool is built beside the intercepting well which needs to be subjected to flow limiting (the judgment method is the same as the above), and the calculation method of the inner diameter of the regulation and storage pool is as follows: as the water quantity in the storage tank is changed, the flow in the flow limiting pipe is also changed, namely, the unsteady flow flows.
As shown in fig. 4, is a schematic of a regulated reservoir of a limited flow discharge. The current-limiting discharge port is externally connected with a current-limiting pipe, and the caliber of the current-limiting discharge port is the same as the pipe diameter of the current-limiting pipe.
From the volume balance it is possible to obtain:
A×dz＝Q1×dt-Q2×dt
in the formula, A: the cross-sectional area of the storage tank is m2；
Q1: the unit of the water inflow of the storage tank is m 3/s;
Q2: the water outlet flow of the flow-limiting discharge port is m 3/s;
z: the liquid level height in the storage tank is adjusted, and the unit is m;
t: time, in units of s.
Since it can still be regarded as a constant flow in each minute period dt, with the elevation at its outlet as the reference point, the energy equation is:
in the formula, P1、P2Respectively the pressure of the liquid level in the storage tank and the pressure at the position of the flow-limiting discharge port, and the unit is kg/m3；
γ: unit weight is KN/m3
V1、V2Respectively regulating the liquid level flow rate in the storage tank and the flow rate at the flow-limiting discharge port, wherein the unit is m/s;
g: acceleration of gravity in m2/s；
α2: and the head loss coefficient of the whole process from the water outlet of the storage tank connected with the intercepting well to the flow-limiting discharge port.
The flow rate at the outlet of the flow-limiting tube is therefore:
so that the instantaneous flow Q at the outlet2Comprises the following steps:
in the formula, A: the cross-sectional area of the flow-limiting tube is m2；
r: the restrictor tube radius, in m.
The time t required for the first liquid level H to descend to the second liquid level H is known as:
from the change in volume, the mean flow Q at the outlet2：
When the inlet flow Q1 is 0:
therefore, the calculation formula of the flow-limiting pipe diameter r is as follows:
wherein H is the height of the highest liquid level of the regulating reservoir, H is the height of the lowest liquid level of the regulating reservoir, and alpha2The head loss coefficient of the whole process from the water outlet of the storage tank connected with the intercepting well to the flow-limiting discharge outlet, g is gravity accelerationDegree, pi is the circumferential ratio.
The utility model discloses an in the embodiment, under the different parameter values, the current-limiting pipe diameter has the not equidistance, is 0 when Q1, and H is 0, and the head loss coefficient is when 1.5, and the highest liquid level H is different in the regulation pond, and its current-limiting pipe diameter value is as follows:
the pipe diameter (mm) in the table is a calculated value, the calculation parameters are changed according to the actual situation, and the pipe diameter parameters are reasonably selected according to the actual situation.
By reasonably calculating the intercepting amount and the limiting amount of the intercepting well, the maximization of load reduction is realized under the condition of a certain intercepting amount.
Further, the utility model discloses well current-limiting volume and current-limiting pipe diameter's calculation and design are comparatively simple, realize more easily in the engineering.
Still further, the utility model discloses a design operation is easily mastered by the practitioner, is easily understood by the practitioner, and can promote the nature by force.
As shown in fig. 5, a schematic diagram of a shut-off system is provided, which comprises a shut-off well 17, a regulation reservoir 18 and a shut-off trunk 13, wherein the structure of the shut-off well 17 and the regulation reservoir 18 adopts the structure and algorithm design described above. In practical use, the system comprises four control modes, namely a cut-off mode, a flow limiting mode, a release mode and a draining-off mode after rain. H1 is a pump stop liquid level in the intercepting well, H2 is a pump start liquid level in the intercepting well, H3 is an overflow liquid level in the intercepting well, and H4 is the liquid level in the intercepting well after the first lifting pump in the intercepting well is started in a flow limiting mode and the running time t is up. Once the liquid level exceeds the H3 overflow level, the mode is switched to the bleeding mode.
A flow-stopping mode: the quality of water of intaking is monitored in real time through the water quality testing instrument of water inlet department, when the quality of water of intaking is higher than first concentration, maintain the liquid level control mode of the first elevator pump in the vatch basin (when the liquid level reaches H2, promote it to in the pipeline of damming through first elevator pump, the liquid level resumes to H1), and record pump start-up number of times M, at every turn on-time Tm and interval Tm (if the water level continues to rise under the mode of damming and reaches liquid level H4, then open the regulation pond gate of intaking, if the water level continues to rise under this condition and reaches liquid level H4, then should close the regulation pond gate of intaking, open and should open emergent discharge gate). When the quality of the inlet water is lower than the first concentration but higher than the second concentration, calculating X (t) according to related data such as a flowmeter, and the like, wherein X (t) is the operating energy occupancy-space occupancy as described above; if X (t) <0, the shut-off mode is maintained, and if X (t) >0, the current limiting mode is activated.
A current limiting mode: and after the flow limiting mode is started, opening a regulating and storing pond water inlet gate and a flow limiting and discharging gate, and closing the water inlet gate of the regulating and storing pond when the water level in the regulating and storing pond reaches the designed highest liquid level or the inlet water quality concentration of the intercepting well is lower than the second concentration. (if the water level continues to rise to reach the liquid level H4 in the current-limiting mode, the inlet gate of the storage tank is closed, and the emergency discharge gate is opened)
Releasing mode: after the closure \ flow limiting mode is operated accumulatively for a period of time, the quality of the inlet water is lower than the second concentration, at the moment, the operation of the first lifting pump is stopped, and the closure of the later rainwater with low concentration is stopped. And opening an overflow discharge gate, and enabling later-stage rainwater to enter the river channel through gravity overflow.
Emptying mode after rain: after rain, the background gives a remote signal manually, the stored water in the pipeline is emptied and the closure mode in sunny days is recovered.
The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the technical field of the utility model belongs to the prerequisite of not deviating from the utility model discloses, can also make a plurality of equal substitution or obvious variants, performance or usage are the same moreover, all should regard as belonging to the utility model's scope of protection.
Claims (10)
1. A flow shutoff system, comprising: the system comprises a catch basin and a regulation and storage pool, wherein the catch basin is positioned at the upstream of the regulation and storage pool, and sewage firstly enters the catch basin;
the top end of the intercepting well is provided with a water inlet, the bottom end of the intercepting well is provided with an intercepting water outlet, the side wall of the intercepting well is respectively provided with an overflow discharge port and a water outlet connected with the regulating and storing tank, and the water outlet is arranged at a height lower than that of the overflow discharge port; the water inlet is used for enabling sewage to enter the intercepting well, the water outlet is used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the intercepting well into the regulating and storing pool, and the overflow discharge outlet is used for discharging the sewage with the concentration lower than the second concentration in the intercepting well into a river channel; a lifting pump connected with the intercepting water outlet is arranged in the intercepting well and used for lifting the sewage with the concentration higher than the first concentration in the intercepting well to an intercepting main pipe; the first concentration and the second concentration are preset and the first concentration is greater than the second concentration;
the regulating and storing pool is connected with the intercepting well through the water outlet, and a flow-limiting discharge port is arranged on the side wall of the regulating and storing pool and used for discharging the sewage with the concentration higher than the second concentration and lower than the first concentration in the regulating and storing pool to the intercepting main pipe; and a lifting pump is arranged in the storage tank and used for emptying the storage tank.
2. The shutoff system of claim 1, wherein said restricted discharge outlet is provided with a restricted discharge valve and said restricted discharge outlet is connected to a flow restricting tube, said flow restricting tube being connected to said shutoff trunk.
3. The fluid shutoff system according to claim 2, wherein the position of said flow restricting vent is determined by a maximum fluid level in said reservoir, a pipe diameter of said flow restricting pipe, and a preset flow restriction amount.
4. The shut-off system of claim 2, wherein said overflow drain and said water outlet are valved.
5. The shutoff system of claim 4, wherein said valve is an electrically operated valve.
6. The shut-off system according to claim 1, wherein a flow meter is provided at a junction of the shut-off water outlet and the shut-off main pipe;
and a flowmeter is arranged at the joint of the flow-limiting discharge port and the intercepting main pipe.
7. The shut-off system as claimed in any one of claims 1 to 6, wherein a water quality meter is provided in the shut-off well for detecting the quality of the sewage water in the shut-off well.
8. A closure system according to any one of claims 1-6, wherein at least one mud bucket is provided within the closure well for storing mud.
9. The shut-off system according to any one of claims 1 to 6, wherein a level gauge is provided in the shut-off well and/or in the storage tank for measuring the liquid level.
10. A shut-off system as claimed in any one of claims 1 to 6, wherein automatic sampling means are provided in the shut-off well for sampling sewage in the shut-off well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020978789.9U CN212224120U (en) | 2020-06-01 | 2020-06-01 | Cut-off system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020978789.9U CN212224120U (en) | 2020-06-01 | 2020-06-01 | Cut-off system |
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| CN212224120U true CN212224120U (en) | 2020-12-25 |
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| CN202020978789.9U Active CN212224120U (en) | 2020-06-01 | 2020-06-01 | Cut-off system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608244A (en) * | 2020-06-01 | 2020-09-01 | 清华大学深圳国际研究生院 | Intercepting system and intercepting method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111608244A (en) * | 2020-06-01 | 2020-09-01 | 清华大学深圳国际研究生院 | Intercepting system and intercepting method |
| CN111608244B (en) * | 2020-06-01 | 2024-05-14 | 清华大学深圳国际研究生院 | Interception system and interception method |
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