CN114962281A - Method for measuring pump station flow based on active power - Google Patents
Method for measuring pump station flow based on active power Download PDFInfo
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- CN114962281A CN114962281A CN202110526044.8A CN202110526044A CN114962281A CN 114962281 A CN114962281 A CN 114962281A CN 202110526044 A CN202110526044 A CN 202110526044A CN 114962281 A CN114962281 A CN 114962281A
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- flow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
Abstract
The invention relates to the technical field of water supply and drainage, in particular to a method for measuring the flow of a pump station based on active power, wherein the pump station transports fluid through fluid transport equipment, and the method comprises the following steps: s1, obtaining working parameters of fluid transportation equipment, wherein the working parameters comprise active power, rated shaft power, rated flow, efficiency and transmission efficiency; and S2, determining the real-time flow of the pump station according to the working parameters of the fluid transportation equipment. The invention provides a method and equipment for measuring pump station flow based on active power, which can obtain real-time flow of a pump station only by measuring the active power of pump station driving equipment, and particularly establishes a mathematical model to measure the pump station flow, namely the flow can be immediately displayed only by measuring the active power of a motor.
Description
Technical Field
The invention relates to the technical field of water supply and drainage, in particular to a method for measuring pump station flow based on active power.
Background
At present, the flow rate of the fluid is measured by a conventional pump station outlet flow rate measuring method through an ultrasonic flow meter or an electromagnetic flow meter. The method measures the cross section of the water outlet pool of the pump station and the flow velocity of water flow and calculates the flow of the pump station, so that the equipment is expensive, complex to install and inconvenient to operate, and the equipment needs frequent maintenance due to large errors when few sensors are used. Especially when needing to carry out later stage transformation, if increase ultrasonic flowmeter or electromagnetic flowmeter, all involve civil engineering and pipeline construction, not only influence the pump station and move, and implement the degree of difficulty big.
Chinese patent CN102032935B discloses a soft measurement method for the flow of a sewage pump station of an urban drainage confluence official network, which predicts the flow of a downstream pump station through the water discharge of an upstream pump station, specifically determines the drainage delay time of the upstream pump station through grey correlation analysis, and accurately predicts the flow and the water level of the confluence pipe network by using a neural network.
The present application is intended to provide an alternative approach to address the deficiencies of the prior art.
Disclosure of Invention
The invention aims to solve the defects of the prior art and provides a method for measuring the flow of a pump station based on active power, and the real-time flow of the pump station can be obtained only by measuring the active power of pump station driving equipment.
In order to achieve the above object, a method for measuring the flow of a pump station based on active power is designed, wherein the pump station transports fluid through a fluid transport device, and the method comprises the following steps: s1, obtaining working parameters of fluid transport equipment, wherein the working parameters comprise active power, rated shaft power, rated flow, efficiency and transmission efficiency; and S2, determining the real-time flow of the pump station according to the working parameters of the fluid transportation equipment.
In S2, the real-time flow rate of the pump station is determined by the following formula:
in the formula: p is the active power of the fluid transport device, P 1 Rated shaft power, Q, for fluid handling equipment 1 Rated flow rate, Q, of fluid-handling equipment 2 Is the real-time flow of the pumping station, eta 1 For the efficiency of the fluid transport device, η 2 is the transmission efficiency.
In S1, only the active power of the fluid transport device is obtained by the detection device.
In S2, the data of the active power is received and the operating parameters are processed to determine the real-time flow of the pumping station.
And transmitting the working parameters and/or the real-time flow of the pump station to a remote platform.
And displaying the working parameters and/or the real-time flow of the pump station in real time.
Advantageous effects of the invention
Compared with the prior art, the invention has the advantages that: the invention provides a method for measuring pump station flow based on active power, which can obtain real-time flow of a pump station only by measuring the active power of pump station driving equipment, and particularly establishes a mathematical model to measure the pump station flow, namely the flow can be immediately displayed only by measuring the active power of a motor.
Drawings
Fig. 1 schematically shows the structure of the present invention.
In the figure: 1. the water pump 2, the cable 3, the detection equipment 4, the data processing equipment 5 and the water pump control cabinet.
Detailed Description
The principles of this method will be apparent to those skilled in the art from the following description of the invention taken in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
The embodiment provides a method for measuring the flow of a pump station based on active power, wherein the pump station transports fluid through fluid transport equipment, and the method comprises the following steps:
s1, obtaining working parameters of fluid transportation equipment, wherein the working parameters comprise active power, rated shaft power, rated flow, efficiency and transmission efficiency;
and S2, determining the real-time flow of the pump station according to the working parameters of the fluid transportation equipment.
Wherein in S1, the active power of the fluid transport device is obtained by the detection device, and the rest of the operating parameters are known parameters.
In S2, receiving, by a data processing device, the detection data of the detection device, and processing the working parameters to determine the real-time flow rate of the pump station, specifically, determining the real-time flow rate of the pump station according to the following formula:
in the formula: p is the active power of the fluid transport device, P 1 Rated shaft power, Q, for fluid handling equipment 1 Rated flow rate, Q, of fluid-handling equipment 2 Is the real-time flow of the pumping station, eta 1 For the efficiency of the fluid transport device, η 2 is the transmission efficiency.
After receiving the detection data of the detection equipment and obtaining the real-time flow of the pump station, the data processing equipment can transmit the working parameters and/or the real-time flow of the pump station to a remote platform in a wired or wireless mode, can also display the working parameters and/or the real-time flow of the pump station in real time, or has two functions simultaneously.
In the embodiment, a mathematical model of the relation between the active power and the flow of the fluid transportation equipment, such as a motor, is established based on the water pump proportion law, and the real-time flow of the pump station is measured according to a mathematical model algorithm after the active power of the pump or the motor is obtained. For example, after obtaining the active power, the working parameters are processed and the real-time flow of the pump station is obtained, and the data is transmitted to the remote platform through wireless transmission. Or after the active power is obtained, the working parameters are transmitted to the data processing equipment at the remote end in a wired or wireless mode for processing.
In the following, the formula for determining the real-time flow rate of the pumping station is explained.
Firstly, according to the water pump proportion law, for the same pump, the flow relation of the pump satisfies:
Q 1 /Q 2 ＝n 1 /n 2 (1)
in the formula, Q 1 The flow rate (m3/h), Q, of the water pump is in the working condition 1 2 Flow (m) of water pump under working condition 2 3 /h)，n 1 Water pump speed n for condition 1 2 And the rotating speed of the water pump is the working condition 2.
Meanwhile, according to the water pump proportion law, for the same pump, the relation of the shaft power of the pump satisfies:
P 1 /P 2 ＝n 1 3 /n 2 3 (2)
in the formula, P 1 Water pump shaft power (m) for working condition 1 3 /h)，P 2 Water pump shaft power (m) for working condition 2 3 /h)，n 1 Water pump speed n for condition 1 2 And the rotating speed of the water pump is the working condition 2.
By integrating equations (1) and (2), it can be derived:
P 1 /P 2 ＝Q 1 3 /Q 2 3 (3)
the formula (3) shows that the ratio of the shaft power input by the water pump is equal to the ratio of the third power of the outlet flow of the water pump; let P 1 Rated shaft power of the water pump, Q 1 Rated flow of the pump, P 2 Is the actual input power of the water pump, Q 2 Is the real-time flow of the water pump.
The power of the pump shaft obtained from the transmission of the motor is called the shaft power, and the actual shaft power P of the water pump is set 2 Let P be the active power of the motor and eta be the motor efficiency 1 Motor transmission efficiency eta 2 Thus, it can be seen that:
P2＝P*η 1 *η 2 (4)
the mathematical model of the pump station water pump flow is established by integrating the formulas (1), (2), (3) and (4) as follows:
in the formula: p is the active power (kw) of the motor, P 1 Rated shaft power (kw), Q, for water pumps 1 Rated flow (m3/h), Q for water pump 2 Is the real-time flow (m3/h), eta of the water pump 1 To the motor efficiency, η 2 For transmission efficiency, the transmission value is 1.
And η in the formula (6) 1 、Q 1 、P 1 Can be directly obtained according to the data of the water pump equipment, eta 2 According to the mechanical transmission efficiency table; p is the active power.
According to the embodiment, the fenchy mill west pump gate, the fenchy mill jin family pump gate and the sunny polder pottery pump station are subjected to test verification, the measured pump station flow is counted to be within a design flow range, and data show that the mathematical model is high in logic and reliable in actual engineering measurement. The hardware device developed by the method is very simple, low in cost and convenient to operate. The flow calculation formula in the method can be suitable for the flow measurement of water supply and drainage pump stations (mixed flow pumps, centrifugal pumps, axial flow pumps, submersible pump stations and the like) in different occasions and different types. The method and the corresponding device developed by the method are used for measuring the flow of the pump station, are only about one tenth of the flow of the similar device, and can be popularized and applied in a large area.
Table 1 fenwopoler triphejing pump gate flow data
TABLE 2 fenchy Wakunjia creek pump sluice flow data
TABLE 3 Taoism pottery pump station data sheet
Claims (6)
1. A method for measuring the flow of a pump station based on active power, wherein the pump station transports fluid through a fluid transport device, is characterized by comprising the following steps:
s1, obtaining working parameters of fluid transportation equipment, wherein the working parameters comprise active power, rated shaft power, rated flow, efficiency and transmission efficiency;
and S2, determining the real-time flow of the pump station according to the working parameters of the fluid transportation equipment.
2. The method according to claim 1, wherein the real-time traffic of the pumping station is determined in S2 according to the following formula:
in the formula: p is the active power of the fluid transport device, P 1 Rated shaft power, Q, for fluid handling equipment 1 Rated flow rate, Q, of fluid-handling equipment 2 Is the real-time flow of the pumping station, eta 1 For the efficiency of the fluid transport device, η 2 is the transmission efficiency.
3. The method according to claim 1 or 2, wherein in the step S1, only the active power of the fluid transportation device is obtained through a detection device.
4. The method for measuring pumping station flow based on active power according to claim 3, wherein in S2, the data of the active power is received and the operation parameters are processed to determine the real-time flow of the pumping station.
5. The method for measuring pump station traffic based on active power according to claim 1, characterized in that the operating parameters and/or the real-time traffic of the pump station are transmitted to a remote platform.
6. The method for measuring pump station flow based on active power according to claim 1, wherein the operating parameters and/or the real-time flow of the pump station are displayed in real time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110526044.8A CN114962281A (en) | 2021-05-14 | 2021-05-14 | Method for measuring pump station flow based on active power |
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| CN202110526044.8A CN114962281A (en) | 2021-05-14 | 2021-05-14 | Method for measuring pump station flow based on active power |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734148A (en) * | 2012-07-04 | 2012-10-17 | 杭州哲达科技股份有限公司 | Water pump type test method |
| CN104563219A (en) * | 2014-12-24 | 2015-04-29 | 卧龙电气集团股份有限公司 | Water supply control method without external sensor |
| CN107850060A (en) * | 2015-06-04 | 2018-03-27 | 流体处理有限责任公司 | The direct affine pump of numerical value is without transducer translating unit |
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2021
- 2021-05-14 CN CN202110526044.8A patent/CN114962281A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102734148A (en) * | 2012-07-04 | 2012-10-17 | 杭州哲达科技股份有限公司 | Water pump type test method |
| CN104563219A (en) * | 2014-12-24 | 2015-04-29 | 卧龙电气集团股份有限公司 | Water supply control method without external sensor |
| CN107850060A (en) * | 2015-06-04 | 2018-03-27 | 流体处理有限责任公司 | The direct affine pump of numerical value is without transducer translating unit |
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