CN110905829B - Intelligent water pump control valve system and control method thereof - Google Patents
Intelligent water pump control valve system and control method thereof Download PDFInfo
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- CN110905829B CN110905829B CN201911181370.9A CN201911181370A CN110905829B CN 110905829 B CN110905829 B CN 110905829B CN 201911181370 A CN201911181370 A CN 201911181370A CN 110905829 B CN110905829 B CN 110905829B
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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
- F04D15/0005—Control, e.g. regulation, of pumps, pumping installations or systems by using valves
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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
- F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
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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
- F04D15/0077—Safety measures
- F04D15/0083—Protection against sudden pressure change, e.g. check valves
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- Engineering & Computer Science (AREA)
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- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
The invention relates to an intelligent water pump control valve system which comprises a non-vortex water pump control valve, monitoring terminal equipment, a water outlet pipeline, an intelligent valve positioner, a centrifugal water pump, a first pipeline pressure sensor, a second pipeline pressure sensor, a shaft sleeve type encoder, a flow sensor and a controller, wherein the non-vortex water pump control valve is connected with the monitoring terminal equipment through a pipeline; the non-vortex water pump control valve is connected with an intelligent valve positioner; the centrifugal water pump comprises a water pump body and a water pump motor, and the shaft sleeve type encoder is sleeved on a main shaft of the water pump motor; the non-vortex water pump control valve is connected with the centrifugal water pump through the flow sensor and the water outlet pipeline in sequence, and the first pipeline pressure sensor and the second pipeline pressure sensor are respectively arranged on the non-vortex water pump control valve; the controller includes PLC controller, lithium cell, electric quantity detection module, converter, water pump open button, water pump close button, wireless communication module, and each electronic components cooperates the connection. The invention solves the problem of water hammer effect caused by sudden opening or closing of the control valve of the water pump.
Description
Technical Field
The invention relates to the technical field of water supply and drainage system pipe network equipment, in particular to an intelligent water pump control valve system and a control method thereof.
Background
At present, a centrifugal water pump is used for pumping in a water supply and drainage system in a common mode, and a water pump control valve is generally arranged at a water outlet of the centrifugal water pump to be matched with the centrifugal water pump to work in combination with the working characteristics of the centrifugal water pump, and when the water pump control valve is suddenly opened or closed, a water hammer effect can be generated on a water supply pipeline network.
In order to prevent the water hammer effect caused by the water supply pipeline network or prevent the reverse rotation of the centrifugal water pump. The existing water pump control valve is characterized in that the application date is 2017, 06 and 28 days, the Chinese patent application publication number is CN107131306A, the existing vortex-free water pump control valve comprises a valve body, a valve cover, a valve clack and an opening and closing device, the valve body is provided with a water inlet, a water outlet and an assembly opening, the water inlet, the water outlet and the assembly opening are communicated with each other at the inner side of the valve body, a valve seat is arranged in the valve body, the valve cover is arranged on the assembly opening of the valve body and is provided with a skirt sleeve, the valve clack is movably arranged at the inner side of the skirt sleeve of the valve cover, the valve clack is in transmission connection with the opening and closing device, the valve clack is provided with a groove and 3-15 copper-zinc alloy guide blocks extending along the axial direction, the inner side wall of the skirt sleeve is coated with chromium oxide ceramic coating with the thickness of 0.1-0.6 mm, the included angle between the axial line between the, the vortex-free water pump control valve can effectively reduce impact caused by a water hammer effect, and the working reliability of the water pump control valve is good.
The inventor indicates that, in the practical use process, the non-vortex water pump control valve can indeed reduce the water hammer effect through the structure thereof, but the water hammer effect is not fundamentally avoided, and the water hammer effect means that when the non-vortex water pump control valve is suddenly opened or closed, water flow generates a pressure on the valve and the pipe wall, mainly the valve, and generates a destructive effect, namely the water hammer effect in the water conservancy. The invention aims to avoid the generation of the water hammer effect from the source of the water hammer effect.
Disclosure of Invention
Therefore, in order to solve the above problems, the present invention provides an intelligent water pump control valve system and a control method thereof, which solve the problem of water hammer effect caused by sudden opening or closing of a valve of a water pump control valve.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides an intelligence water pump control valve system, includes no vortex type water pump control valve, no vortex type water pump control valve includes valve body, valve gap, valve clack and headstock gear, no vortex type water pump control valve is equipped with water inlet, delivery port and assembly mouth, and water inlet, delivery port and assembly mouth communicate each other in the valve body inboard, are equipped with the disk seat in the valve body, the valve gap is located on the assembly mouth of valve body and it has the skirt cover that is located the valve body and extends to the disk seat part, the valve clack is cavity tubbiness structure and its portable locates the skirt cover of valve gap inboard, and the valve clack is portable to be located in the valve gap, and headstock gear sets firmly in the valve gap, and the valve clack is connected the setting with the headstock gear transmission, intelligence water pump control valve system still includes monitor terminal equipment, outlet conduit, intelligent valve locator, centrifugal water pump, first pipeline pressure sensor, second pipeline, The system comprises a shaft sleeve type encoder, a flow sensor and a controller; the opening and closing device is connected with the intelligent valve positioner, a first water diversion hole is formed in a water inlet of the non-vortex water pump control valve, and a second water diversion hole is formed in a water outlet of the non-vortex water pump control valve; the centrifugal water pump comprises a water pump body and a water pump motor for driving the water pump body, and the shaft sleeve type encoder is sleeved on a main shaft of the water pump motor;
the water outlet of the non-vortex water pump control valve is connected with the centrifugal water pump sequentially through the flow sensor and the water outlet pipeline, the first pipeline pressure sensor is installed on the first water diversion hole, and the second pipeline pressure sensor is installed on the second water diversion hole;
the controller comprises a PLC controller, a lithium battery, an electric quantity detection module, a frequency converter, a water pump starting button, a water pump closing button and a wireless communication module, the power end of the PLC controller and the electric quantity detection module are respectively and electrically connected with the power end of the lithium battery, the PLC is electrically connected with the electric quantity detection module, the control ends of the flow sensor, the first pipeline pressure sensor, the second pipeline pressure sensor, the shaft sleeve type encoder, the electric quantity detection module, the water pump opening button, the water pump closing button and the frequency converter are respectively and electrically connected with an I/O port of the PLC, the intelligent valve positioner and the wireless communication module are respectively in communication connection with the PLC, the power input end of the frequency converter is connected with commercial power, the power output end of the frequency converter is connected with the water pump motor, and the wireless communication module is in wireless communication connection with the monitoring terminal device.
Further, the controller also comprises a touch screen, and the touch screen is in communication connection with the PLC.
The control method applied to the intelligent water pump control valve system comprises the following steps:
step one, setting a rated rotating speed of a water pump motor, a rated working water pressure before a valve of a vortex-free water pump control valve and a rated working water pressure after the valve of the vortex-free water pump control valve through a touch screen, detecting a water pressure before the valve of the vortex-free water pump control valve by a first pipeline pressure sensor, and entering a step two when the water pressure before the valve of the vortex-free water pump control valve detected by the first pipeline pressure sensor reaches 1-1.5 times of the rated working water pressure before the valve;
when the first pipeline pressure sensor detects that the water pressure in front of the non-vortex water pump control valve is smaller than the preset working water pressure in front of the valve or is larger than 1.5 times of the preset working water pressure in front of the valve, the PLC sends abnormal information of the water pressure in front of the valve to the monitoring terminal equipment through the wireless communication module, and the step II is not executed;
pressing a water pump opening button, controlling the frequency converter to be electrified and started by the PLC, starting the water pump motor to rotate, and controlling the intelligent valve positioner to open the non-vortex water pump control valve by the PLC when the shaft sleeve type encoder detects that the rotating speed of the water pump motor reaches a rated rotating speed;
step three, a second pipeline pressure sensor detects the water pressure behind the valve of the non-vortex water pump control valve, when the water pressure behind the valve of the non-vortex water pump control valve detected by the second pipeline pressure sensor is higher than the rated working water pressure behind the valve of the non-vortex water pump control valve, a PLC controller controls a frequency converter to reduce the frequency and reduce the rotating speed of a water pump motor, and meanwhile, the PLC controller controls an intelligent valve positioner to reduce the valve opening of the non-vortex water pump control valve; when the second pipeline pressure sensor detects that the water pressure behind the valve of the non-vortex water pump control valve is lower than the rated working water pressure behind the valve of the non-vortex water pump control valve, the PLC controller controls the frequency converter to increase the frequency and increase the rotating speed of the water pump motor, and meanwhile, the PLC controller controls the intelligent valve positioner to increase the valve opening of the non-vortex water pump control valve; the water pressure behind the valve of the non-vortex type water pump control valve is kept at the rated working water pressure behind the valve.
Further, the valve closing method of the non-vortex water pump control valve comprises the following steps:
step one, a water pump closing button is pressed, and the flow Q of a water outlet pipeline is detected by a flow sensor when the water pump closing button is pressed and transmitted to a PLC (programmable logic controller);
step two, the PLC controller controls the intelligent valve positioner to reduce the valve opening of the pump control valve without the vortex until the flow sensor detects that the real-time flow of the water outlet pipeline is 80-90% Q, and the PLC controller controls the intelligent valve positioner to keep the valve opening of the pump control valve without the vortex at present;
and step three, the PLC controls the frequency converter to be closed, the water pump motor is slowly stopped, and when the shaft sleeve type encoder detects that the water pump motor stops, the PLC controls the intelligent valve positioner to close the valve of the vortex-free water pump control valve.
By adopting the technical scheme, the beneficial effects of the invention comprise the following:
(1) the water hammer effect is produced when avoiding not having the open valve of vortex type water pump control valve, and is concrete, detects the water pressure before the valve of not having the vortex type water pump control valve through first pipeline water pressure sensor, detects the rotational speed of water pump motor through rotary encoder, and no vortex type water pump control valve open valve need satisfy two conditions: 1. the water pressure in front of the valve of the non-vortex water pump control valve reaches 1-1.5 times of the preset working water pressure in front of the valve, so that the insufficient water pressure or the excessive water pressure of the water supply of the non-vortex water pump control valve is avoided; 2. the rotation speed of the water pump motor is controlled by the PLC to reach the rated rotation speed of the water pump motor. When the rotating speed of the water pump motor reaches the rated rotating speed of the water pump motor, the non-vortex type water pump control valve is controlled to open, and the water hammer effect generated when the non-vortex type water pump control valve is opened can be effectively avoided.
(2) When the first pipeline water pressure sensor detects that the water pressure in front of the non-vortex water pump control valve is smaller than the preset working water pressure in front of the valve or larger than 1.5 times of the preset working water pressure in front of the valve, the PLC sends abnormal water pressure information in front of the valve to the monitoring terminal device through the wireless communication module, and timely informs workers of overhauling.
(3) The method has the advantages that the water hammer effect generated when the vortex-free water pump control valve is closed is avoided, and specifically, when the vortex-free water pump control valve is not directly closed, the flow Q of the water outlet pipeline is detected by the flow sensor when the water pump closing button is pressed and is transmitted to the PLC; then the PLC controller controls the intelligent valve positioner to reduce the valve opening of the non-vortex water pump control valve until the flow sensor detects that the real-time flow of the water outlet pipeline is 80-90% Q, and the valve opening of the current non-vortex water pump control valve is kept; and then the PLC controller controls the centrifugal water pump to be slowly closed until the centrifugal water pump is closed, and controls the intelligent valve positioner to close the non-vortex water pump control valve, so that the water hammer effect generated when the non-vortex water pump control valve is opened can be effectively avoided.
Drawings
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is a circuit connection block diagram of the present invention.
Detailed Description
The invention will now be further described with reference to the accompanying drawings and detailed description.
Referring to fig. 1 and 2, the present embodiment provides an intelligent water pump control valve system, which includes a non-vortex water pump control valve, a water outlet pipe 5, a flow sensor 6, a centrifugal water pump 7, a first pipe pressure sensor 8, a second pipe pressure sensor 9, an intelligent valve positioner 10, a controller 11, a shaft sleeve type encoder 20, and a monitoring terminal device 21. The vortex-free water pump control valve is characterized by comprising a valve body 1, a valve cover 2, a valve flap 3 and an opening and closing device 4, the vortex-free water pump control valve is provided with a water inlet 100, a water outlet 200 and an assembly opening 300, the water inlet 100, the water outlet 200 and the assembly opening 300 are communicated with each other on the inner side of the valve body 1, a valve seat 400 is arranged in the valve body 1, the valve cover 2 is arranged on the assembly opening 300 of the valve body 1 and is provided with a skirt sleeve 500 which is positioned in the valve body 1 and partially extends towards the valve seat 400, the valve flap 3 is of a hollow barrel-shaped structure and is movably arranged on the inner side of the skirt sleeve 500 of the valve cover 2, the valve flap 3 is movably arranged in the valve cover 2, the opening and closing device 4 is fixedly arranged in the valve cover 2, the valve flap 3 is in transmission connection with the opening and closing device 4, and the vortex-free water pump control valve structure is a known technology, and will not be described in detail herein. The intelligent valve positioner 10 is IP 8001-032-EW. The controller comprises a PLC (programmable logic controller) 12, a lithium battery 13, an electric quantity detection module 14, a water pump starting button 15, a water pump closing button 16, a frequency converter 17, a wireless communication module 18 and a touch screen 19. In this specific real-time example, preferably, the PLC controller 12 employs a siemens S7-200 series PLC, the water pump start button 15 and the water pump stop button 16 both employ button switches, the wireless communication module 18 employs a 4G module, and the lithium battery 13, the electric quantity detection module 14, the frequency converter 17, and the touch screen 19 are all existing devices. The wireless communication module 18 may be replaced by a wireless communication module such as a 3G module, an RF wireless module, or a 2.4G wireless module. The monitoring terminal device 21 is a computer. All the electronic components and the circuit module are existing equipment.
The opening and closing device 4 is connected with an intelligent valve positioner 10, and the connecting technology is a connecting technology means which is conventional in the field. A first water diversion hole 600 is formed in a water inlet 100 of the non-vortex type water pump control valve, and a second water diversion hole 700 is formed in a water outlet 200 of the non-vortex type water pump control valve; the centrifugal water pump 7 includes a water pump body 71 and a water pump motor 72 for driving the water pump body 71 (the mounting structure of the water pump body 71 and the water pump motor 72 is known in the art), and the sleeve-type encoder 20 is sleeved on a main shaft of the water pump motor 72 (not shown in the figure, the mounting structure of the sleeve-type encoder 20 sleeved on the main shaft of the water pump motor 72 is known in the art). The water outlet 200 of the non-vortex water pump control valve is connected with the centrifugal water pump 7 sequentially through the flow sensor 6 and the water outlet pipeline 5, the first pipeline pressure sensor 8 is installed on the first water diversion hole 600, and the second pipeline pressure sensor 9 is installed on the second water diversion hole 700.
The power end and the electric quantity detection module 14 of the PLC controller 12 are respectively electrically connected with the power end of the lithium battery 13, the PLC controller 12 is electrically connected with the electric quantity detection module 14, the lithium battery 13 supplies power for the PLC controller 12, and the electric quantity detection module 14 is used for detecting the electric quantity of the lithium battery 13 and transmitting the electric quantity to the PLC controller 12. When the electric quantity of the lithium battery 13 is insufficient, the PLC controller 12 transmits the lithium battery circuit shortage information to the monitoring terminal device 21 through the wireless communication module 18, and reminds the staff to replace the lithium battery 13 of the controller 11. Flow sensor 6, first pipeline pressure sensor 8, second pipeline pressure sensor 9, axle sleeve formula encoder 20, water pump open button 15, water pump close button 16, converter 17's control end is connected with PLC controller 12's IO port electricity respectively, intelligent valve locator 10 and wireless communication module 18 respectively with PLC controller 12 communication connection, the commercial power is connected to converter 17's power input end, water pump motor 72 is connected to converter 17's power output end, wireless communication module 18 and monitor terminal equipment 21 wireless communication connection. The above-mentioned connecting technical means between the electronic component and the circuit module are all conventional electrical connecting technical means in the field.
The control method of the intelligent water pump control valve system comprises the following steps:
(1) the valve opening method of the non-vortex water pump control valve comprises the following steps:
step one, the rated rotating speed of the water pump motor 72, the rated working water pressure before the valve of the vortex-free water pump control valve and the rated working water pressure after the valve of the vortex-free water pump control valve are set through the touch screen 19, the first pipeline pressure sensor 8 detects the water pressure before the valve of the vortex-free water pump control valve, and the step two is carried out when the first pipeline pressure sensor 8 detects that the water pressure before the valve of the vortex-free water pump control valve reaches 1-1.5 times of the rated working water pressure before the valve. Specifically, in this embodiment, it is preferable that the step two is performed when the first line pressure sensor 8 detects that the pre-valve water pressure of the non-swirl water pump control valve reaches the pre-valve set working water pressure;
when the first pipeline pressure sensor detects that the water pressure in front of the non-vortex water pump control valve is smaller than the preset working water pressure in front of the valve or is larger than 1.5 times of the preset working water pressure in front of the valve, the PLC sends abnormal information of the water pressure in front of the valve to the monitoring terminal equipment through the wireless communication module, and the step II is not executed;
step two, pressing a water pump opening button 15, controlling the frequency converter 17 to be powered on and started by the PLC 12, starting the water pump motor 72 to rotate, and controlling the intelligent valve positioner 10 to open the non-vortex type water pump control valve by the PLC 12 when the shaft sleeve type encoder 20 detects that the rotating speed of the water pump motor 72 reaches a rated rotating speed;
step three, the second pipeline pressure sensor 9 detects the water pressure behind the valve of the non-vortex water pump control valve, when the water pressure behind the valve of the non-vortex water pump control valve detected by the second pipeline pressure sensor 9 is higher than the rated working water pressure behind the valve of the non-vortex water pump control valve, the PLC 12 controls the frequency converter 17 to reduce the frequency, the rotating speed of the water pump motor 72 is reduced, and meanwhile, the PLC 12 controls the intelligent valve positioner 10 to reduce the valve opening of the non-vortex water pump control valve; when the second pipeline pressure sensor 9 detects that the water pressure behind the valve of the non-vortex water pump control valve is lower than the rated working water pressure behind the valve of the non-vortex water pump control valve, the PLC 12 controls the frequency converter 17 to increase the frequency and increase the rotating speed of the water pump motor 72, and meanwhile, the PLC 12 controls the intelligent valve positioner 10 to increase the valve opening of the non-vortex water pump control valve; the water pressure behind the valve of the non-vortex type water pump control valve is kept at the rated working water pressure behind the valve.
(2) The valve closing method of the non-vortex water pump control valve comprises the following steps:
step one, a water pump closing button 16 is pressed, and the flow Q of a water outlet pipeline 5 when the water pump closing button 16 is pressed is detected through a flow sensor 6 and transmitted to a PLC (programmable logic controller) 12;
step two, the PLC 12 controls the intelligent valve positioner 10 to reduce the valve opening of the non-vortex water pump control valve until the flow sensor 6 detects that the real-time flow of the water outlet pipeline 5 is 80% -90% Q, and the PLC 12 controls the intelligent valve positioner 10 to keep the valve opening of the current non-vortex water pump control valve;
and step three, the PLC 12 controls the frequency converter 17 to be closed, the water pump motor 71 is slowly stopped, and when the shaft sleeve type encoder 20 detects that the water pump motor 72 is stopped, the PLC 12 controls the intelligent valve positioner 10 to close the valve of the vortex-free water pump control valve.
The intelligent water pump control valve system is used by matching with a control method thereof, and the problem of water hammer effect caused by sudden opening or closing of a valve of the water pump control valve is solved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (2)
1. A control method of an intelligent water pump control valve system comprises a non-vortex type water pump control valve, wherein the non-vortex type water pump control valve comprises a valve body, a valve cover, a valve clack and an opening and closing device, the non-vortex type water pump control valve is provided with a water inlet, a water outlet and an assembling port, the water inlet, the water outlet and the assembling port are communicated with each other at the inner side of the valve body, a valve seat is arranged in the valve body, the valve cover is arranged on the assembling port of the valve body and is provided with a skirt sleeve which is positioned in the valve body and extends towards the part of the valve seat, the valve clack is of a hollow barrel-shaped structure and can be movably arranged at the inner side of the skirt sleeve of the valve cover, the valve clack can be movably arranged; the intelligent water pump control valve system also comprises monitoring terminal equipment, a water outlet pipeline, an intelligent valve positioner, a centrifugal water pump, a first pipeline pressure sensor, a second pipeline pressure sensor, a shaft sleeve type encoder, a flow sensor and a controller; the opening and closing device is connected with the intelligent valve positioner, a first water diversion hole is formed in a water inlet of the non-vortex water pump control valve, and a second water diversion hole is formed in a water outlet of the non-vortex water pump control valve; the centrifugal water pump comprises a water pump body and a water pump motor for driving the water pump body, and the shaft sleeve type encoder is sleeved on a main shaft of the water pump motor; the water outlet of the non-vortex water pump control valve is connected with the centrifugal water pump sequentially through the flow sensor and the water outlet pipeline, the first pipeline pressure sensor is installed on the first water diversion hole, and the second pipeline pressure sensor is installed on the second water diversion hole; the controller comprises a PLC controller, a lithium battery, an electric quantity detection module, a frequency converter, a water pump starting button, a water pump stopping button, a wireless communication module and a touch screen, wherein the power supply end and the electric quantity detection module of the PLC controller are respectively and electrically connected with the power supply end of the lithium battery, the PLC controller is electrically connected with the electric quantity detection module, the flow sensor, the first pipeline pressure sensor, the second pipeline pressure sensor, the shaft sleeve type encoder, the electric quantity detection module, the water pump starting button, the water pump stopping button and the control end of the frequency converter are respectively and electrically connected with an I/O port of the PLC controller, the intelligent valve positioner and the wireless communication module are respectively in communication connection with the PLC controller, the power supply input end of the frequency converter is connected with commercial power, the power supply output end of the frequency converter is connected with a water pump motor, and the wireless communication module is in wireless communication connection, the touch screen is in communication connection with the PLC;
the non-vortex water pump control valve is characterized in that the valve opening method comprises the following steps:
step one, setting a rated rotating speed of a water pump motor, a rated working water pressure before a valve of a vortex-free water pump control valve and a rated working water pressure after the valve of the vortex-free water pump control valve through a touch screen, detecting a water pressure before the valve of the vortex-free water pump control valve by a first pipeline pressure sensor, and entering a step two when the water pressure before the valve of the vortex-free water pump control valve detected by the first pipeline pressure sensor reaches 1-1.5 times of the rated working water pressure before the valve;
when the first pipeline pressure sensor detects that the water pressure in front of the non-vortex water pump control valve is smaller than the preset working water pressure in front of the valve or is larger than 1.5 times of the preset working water pressure in front of the valve, the PLC sends abnormal information of the water pressure in front of the valve to the monitoring terminal equipment through the wireless communication module, and the step II is not executed;
pressing a water pump opening button, controlling the frequency converter to be electrified and started by the PLC, starting the water pump motor to rotate, and controlling the intelligent valve positioner to open the non-vortex water pump control valve by the PLC when the shaft sleeve type encoder detects that the rotating speed of the water pump motor reaches a rated rotating speed;
step three, a second pipeline pressure sensor detects the water pressure behind the valve of the non-vortex water pump control valve, when the water pressure behind the valve of the non-vortex water pump control valve detected by the second pipeline pressure sensor is higher than the rated working water pressure behind the valve of the non-vortex water pump control valve, a PLC controller controls a frequency converter to reduce the frequency and reduce the rotating speed of a water pump motor, and meanwhile, the PLC controller controls an intelligent valve positioner to reduce the valve opening of the non-vortex water pump control valve; when the second pipeline pressure sensor detects that the water pressure behind the valve of the non-vortex water pump control valve is lower than the rated working water pressure behind the valve of the non-vortex water pump control valve, the PLC controller controls the frequency converter to increase the frequency and increase the rotating speed of the water pump motor, and meanwhile, the PLC controller controls the intelligent valve positioner to increase the valve opening of the non-vortex water pump control valve; the water pressure behind the valve of the non-vortex type water pump control valve is kept at the rated working water pressure behind the valve.
2. The method for controlling an intelligent water pump control valve system according to claim 1, wherein the method for closing the non-vortex type water pump control valve comprises the following steps:
step one, a water pump closing button is pressed, and the flow Q of a water outlet pipeline is detected by a flow sensor when the water pump closing button is pressed and transmitted to a PLC (programmable logic controller);
step two, the PLC controller controls the intelligent valve positioner to reduce the valve opening of the pump control valve without the vortex until the flow sensor detects that the real-time flow of the water outlet pipeline is 80-90% Q, and the PLC controller controls the intelligent valve positioner to keep the valve opening of the pump control valve without the vortex at present;
and step three, the PLC controls the frequency converter to be closed, the water pump motor is slowly stopped, and when the shaft sleeve type encoder detects that the water pump motor stops, the PLC controls the intelligent valve positioner to close the valve of the vortex-free water pump control valve.
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| CN110905829A (en) | 2020-03-24 |
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