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Constant-flow-rate water drainage control method and control system

A control method and control system technology, applied in the field of constant flow drainage control method and control system, can solve the problems of control lag and low control precision, and achieve the effects of precise control, fast response speed and high reliability

Active Publication Date: 2019-10-11
SCIMEE TECH & SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of control lag and low control precision in the prior art, the technical solution adopted in the present invention is: a constant flow drainage control method, including monitoring the liquid level height at the opening and closing gate, and obtaining the liquid level height data , calculate the corresponding theoretical flow area according to the set drainage flow and the liquid level height data, adjust the opening of the opening and closing gate so that the real-time flow area of ​​the opening and closing gate is equal to the theoretical flow area

Method used

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  • Constant-flow-rate water drainage control method and control system
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  • Constant-flow-rate water drainage control method and control system

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Experimental program
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Effect test

Embodiment 1

[0051] see figure 1 , the present embodiment provides a constant flow drainage control method, including step 1, monitoring the liquid level height at the opening and closing gate 101, and obtaining liquid level height data; step 2, according to the set drainage flow rate and the described Calculate the theoretical flow area corresponding to the liquid level data; step 3, adjust the opening of the opening and closing gate 101 so that the real-time flow area of ​​the opening and closing gate 101 is equal to the theoretical flow area. As for the opening and closing gate 101, there is a definite corresponding relationship between the opening of the opening and closing gate 101 and the real-time flow area of ​​the opening and closing gate 101, and according to the knowledge of hydraulics, it can be known that a water passage hole 207 under water There is a definite corresponding relationship between the drainage flow rate at the water hole 207 and the flow area of ​​the water hole...

Embodiment 2

[0061] According to the above method, this embodiment provides a constant flow drainage control system, including the opening and closing gate 101 installed at the drain, the driving part 102 for adjusting the opening of the opening and closing gate 101, and the control system for monitoring the liquid level. The liquid level sensor 103, and the controller 104 connected to the drive unit 102 and the liquid level sensor 103 respectively, the controller 104 is used to obtain the liquid level height data collected by the liquid level sensor 103, and according to the set Drainage flow and the height data of the liquid level control the drive unit 102 to adjust the opening of the opening and closing gate 101, as figure 1 , figure 2 and image 3 shown. Because for the opening and closing gate 101, there is a definite correspondence between the opening of the opening and closing gate 101 and the real-time flow area of ​​the opening and closing gate 101 (that is, when the opening o...

Embodiment 3

[0078] According to the method provided in Embodiment 1, this embodiment provides a way for the controller 104 to achieve precise control in the constant flow drainage control system described in Embodiment 2:

[0079] In this embodiment, the driving unit 102 is a hydraulic cylinder, and the controller 104 stores the above calculation formula and the corresponding relationship between k and h (different according to the shape of the water hole 207).

[0080] When the liquid level sensor 103 detects that the current liquid level height is H 1 , according to the formula and S 1 =k 1 h 1 ,Available:

[0081]

[0082] Among them, S 1 is the current flow area;

[0083] When the liquid level sensor 103 detects that the current liquid level height is H 2 , it can be concluded that:

[0084]

[0085] Since the flow rate needs to be controlled constant, that is, Q 1 =Q 2 , then there are:

[0086]

[0087] Organized to get:

[0088]

[0089] where k 1 、k 2 , ...

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Abstract

The invention relates to a constant-flow-rate water drainage control method and control system. The control method comprises the following steps: monitoring a liquid level height at an opening-closinggate, and obtaining liquid level height data; calculating a corresponding theoretical overflowing area according to a set water drainage flow rate and the liquid level height data; and adjusting theopening degree of the opening-closing gate and enabling the real-time overflowing area of the opening-closing gate to be equal to the theoretical overflowing area. The constant-flow-rate water drainage control method is capable of realizing accurate and stable control for the water drainage flow rate; and the constant-flow-rate water drainage control system is compact in structure, convenient to install, low in cost, high in response speed, and not liable to cause the problem of blocking and sealing failure.

Description

technical field [0001] The invention relates to the technical field of water supply and drainage, in particular to a constant flow drainage control method and control system for controlling the opening of a gate according to the height of the liquid level. Background technique [0002] In the drainage project, the water body in the reservoir and the overflow corridor needs to be discharged to the treatment system (such as sewage treatment plant, etc.) or the natural water body through the back-end pipe network. Large changes will occur. For example, when there is a sudden heavy rain, if it is directly discharged into the back-end pipe network, it will cause a sudden change in the pressure of the pipe network, a surge in water volume, and a large impact load on the treatment system; if the water volume of the back-end drainage pipe network is too large , may also be poured back from the outlet to the reservoir or overflow corridor. [0003] In the prior art, it is usually ne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E03F7/02
CPCE03F7/02E03F2201/20E03F2201/30
Inventor 佟斯翰汤杰杨佳奇王哲晓肖波
Owner SCIMEE TECH & SCI CO LTD
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