CN115306737A - Method for remotely controlling exhaust of water pump - Google Patents
Method for remotely controlling exhaust of water pump Download PDFInfo
- Publication number
- CN115306737A CN115306737A CN202210986227.2A CN202210986227A CN115306737A CN 115306737 A CN115306737 A CN 115306737A CN 202210986227 A CN202210986227 A CN 202210986227A CN 115306737 A CN115306737 A CN 115306737A
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- China
- Prior art keywords
- water pump
- valve
- electromagnetic valve
- plc
- control
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
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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
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
Abstract
The invention discloses a method for remotely controlling exhaust of a water pump, which belongs to the technical field of steel rolling and adopts a PLC (programmable logic controller), wherein the PLC is in communication connection with a human-computer interface; the input end of the PLC is connected with the output end of the pressure sensor, and the output end of the PLC is correspondingly connected with the input end of the water pump driver, the control end of the electric valve and the control end of the electromagnetic valve respectively; the method comprises the following steps: when the PLC receives a starting signal, the control electromagnetic valve is powered on and opened, the water pump exhausts, timing is started at the moment, when the timing reaches a time value t1, the control electromagnetic valve is powered off and closed, the water pump finishes exhausting, meanwhile, the water pump driver is controlled to be opened, when the timing reaches a time value t2, and a pressure value detected by the pressure sensor in real time reaches 75% of a rated value of water outlet pressure of the water pump, the control electromagnetic valve is powered on and opened, and water is supplied to a user. The invention can solve the problems of high labor intensity and low working efficiency of the water pump opening of the existing circulating cooling water system.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a method for remotely controlling air exhaust of a water pump.
Background
The circulating cooling water system is a system which plays an important role in equipment safety and product performance and is indispensable in steel rolling production, and comprises a water supply pump set, a horizontal centrifugal water pump is usually used in the conventional water supply pump set, when the circulating cooling water system works, the water pump is started to convey cooling water with rated pressure to each user point to cool rolled pieces, used steel rolling wastewater flows back to a sedimentation tank from a water collecting tank, is subjected to process treatment such as sedimentation for removing oxide scales, then is conveyed to purification equipment by a water pump for purification and the like, then enters a hot water tank, the water pump conveys hot water to a cooling tower for cooling, finally flows back to a cold water tank, and is conveyed to each water point by the water pump again, and the process is circulated. In the process, the temperature of water can reach 50-60 ℃, and gas is retained in the water pump under the action of a medicament in the purification process, the gas is required to be thoroughly discharged before the water pump is started, otherwise, the phenomena of gas binding and cavitation erosion can occur, and equipment is damaged; however, the water pump needs to be started or stopped continuously along with the change of the production water in production, and before starting, an operator needs to go beside the machine to open a manual ball valve at the top of the water pump to exhaust air every time, so that the problems of high labor intensity and low working efficiency exist.
Disclosure of Invention
The invention provides a method for remotely controlling the exhaust of a water pump, which can solve the problems of high labor intensity and low working efficiency in the starting of the water pump in the conventional circulating cooling water system.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the method for remotely controlling the exhaust of the water pump adopts a PLC and an electromagnetic valve arranged on an exhaust pipe of the water pump, a pressure sensor is arranged at the water outlet end of the water pump, an electric valve is arranged on a water outlet pipe of the water pump, and the PLC is in communication connection with a man-machine interface; the signal input end of the PLC is connected with the signal output end of the pressure sensor, and the signal output end of the PLC is correspondingly connected with the signal input end of the water pump driver, the control end of the electric valve and the control end of the electromagnetic valve respectively;
the control method comprises the following steps: when the PLC receives a starting signal output by the man-machine interface, the control electromagnetic valve is powered on and opened, the water pump starts to exhaust, timing is started at the moment, when the timing reaches a time value t1, the control electromagnetic valve is powered off and closed, the water pump finishes exhausting, and meanwhile, the control water pump driver is started, and when the timing reaches a time value t2 and a pressure value detected by the pressure sensor in real time reaches 75% of a rated value of water outlet pressure of the water pump, the control electromagnetic valve is powered on and opened to supply water to a user.
In the above technical solution, a more specific technical solution may also be: t1 is 20-25 seconds; t2 is 35 seconds to 40 seconds.
Further: the electromagnetic valve is a direct-acting zero-pressure-difference starting normally-closed electromagnetic switch valve with a manual function, and the applicable pressure range of the electromagnetic valve is as follows: 0 to 2.5MPa.
And further: the electric valve is an electric butterfly valve.
Further: the water pump is characterized in that a first manual valve is arranged on a water inlet pipe of the water pump, and a second manual valve and a multifunctional control valve which are connected with the electric valve in series are arranged on a water outlet pipe of the water pump.
Due to the adoption of the technical scheme, compared with the prior art, the invention has the following beneficial effects:
1. according to the method, the PLC is controlled and is in communication connection with the man-machine interface, so that the remote automatic control of the water pump is realized, the labor intensity is reduced, the production efficiency is improved, the structure is simple, only the electromagnetic valve needs to be additionally arranged on the original equipment, the original structure does not need to be changed, the installation is convenient, and the use and maintenance cost is reduced.
2. T1 is 20-25 seconds; enough time can be ensured for thoroughly exhausting the gas; t2 is 35-40 seconds, so that the water pump can have sufficient time to increase the rotating speed to a rated value, the water outlet pressure of the water pump reaches 75% of the rated value, and the stable operation of the water pump is ensured.
3. Because the electromagnetic valve is a direct-acting zero-pressure-difference starting normally-closed electromagnetic switch valve with a manual function, the applicable pressure range of the electromagnetic valve is 0-2.5 MPa, and the electromagnetic valve can adapt to the working condition that the internal pressure of the water pump changes from 0-2.5 MPa without being damaged.
4. Because the electric valve is an electric butterfly valve, the opening and closing speed of the electric valve is moderate, the impact of the water pressure of the water pump on/off on equipment is reduced, and the damage caused by the severe change of the load of a water pump driver is avoided.
Drawings
FIG. 1 is a control schematic block diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of a water pump pipeline structure according to an embodiment of the invention.
Detailed Description
The invention will be further described in detail with reference to the following examples:
example one
The method for remotely controlling the exhaust of the water pump adopts a PLC1 shown in figure 1 and an electromagnetic valve 2 on a water pump pipeline shown in figure 2, wherein the electromagnetic valve 2 is arranged on an exhaust pipe 4 of a water pump 3, the electromagnetic valve 2 is a direct-acting zero-pressure-difference starting normally-closed electromagnetic switch valve with a manual function (the model is S50-15204H), and the applicable pressure range of the electromagnetic valve 2 is 0-2.5 MPa; a first manual valve 5 is arranged on a water inlet pipe of the water pump 3, a pressure sensor 6 is arranged at a water outlet end of the water pump 3, and a multifunctional control valve 7, an electric valve 8 and a second manual valve 9 are connected to a water outlet pipe of the water pump 3 in series; the electric valve 8 is an electric butterfly valve; as shown in fig. 2, the water pump 3 is driven to be turned on by the water pump driver 10; the PLC establishes communication connection with a man-machine interface 12 through a communication network 11; the signal input end of the PLC1 is connected with the signal output end of the pressure sensor 6, and the signal output end of the PLC1 is respectively and correspondingly connected with the signal input end of the water pump driver 10, the control end of the electric valve 8 and the control end of the electromagnetic valve 2; the man-machine interface 12 is arranged in the centralized control room;
the control method comprises the following steps: when the PLC receives a starting signal output by the man-machine interface, the control electromagnetic valve is powered on and opened, the water pump starts to exhaust, timing is started at the moment, when the timing reaches a time value t1, the t1 is 20 seconds, the control electromagnetic valve is powered off and closed, the water pump finishes exhausting, meanwhile, the water pump driver is controlled to be started, when the timing reaches a time value t2, the t2 is 35 seconds, and a pressure value detected by the pressure sensor in real time reaches 75% of a rated value of water outlet pressure of the water pump, the electric valve is powered on and opened, and water is supplied to a user.
The invention realizes the remote automatic control of the water pump, not only reduces the labor intensity and improves the production efficiency, but also has simple structure, only needs to additionally install the electromagnetic valve on the original equipment without changing the original structure, is convenient to install and reduces the use and maintenance cost.
Example two
t1 is 22 seconds; t2 is 37 seconds; the rest is the same as the first embodiment.
EXAMPLE III
t1 is 25 seconds; t2 is 40 seconds; the rest is the same as the first embodiment.
Claims (5)
1. A method of remotely controlling water pump venting, comprising: the method comprises the following steps that a PLC and an electromagnetic valve arranged on an exhaust pipe of a water pump are adopted, a pressure sensor is arranged at the water outlet end of the water pump, an electric valve is arranged on a water outlet pipe of the water pump, and the PLC is in communication connection with a man-machine interface; the signal input end of the PLC is connected with the signal output end of the pressure sensor, and the signal output end of the PLC is correspondingly connected with the signal input end of the water pump driver, the control end of the electric valve and the control end of the electromagnetic valve respectively;
the control method comprises the following steps: when the PLC receives a starting signal output by the man-machine interface, the control electromagnetic valve is powered on and opened, the water pump starts to exhaust, timing is started at the moment, when the timing reaches a time value t1, the control electromagnetic valve is powered off and closed, the water pump finishes exhausting, and meanwhile, the control water pump driver is started, and when the timing reaches a time value t2 and a pressure value detected by the pressure sensor in real time reaches 75% of a rated value of water outlet pressure of the water pump, the control electromagnetic valve is powered on and opened to supply water to a user.
2. The method of remotely controlling water pump venting as recited in claim 1, wherein: t1 is 20 seconds to 25 seconds; t2 is 35 seconds to 40 seconds.
3. The method of remotely controlling water pump venting according to claim 1 or 2, wherein: the electromagnetic valve is a direct-acting zero-pressure-difference starting normally-closed electromagnetic switch valve with a manual function, and the applicable pressure range of the electromagnetic valve is as follows: 0 to 2.5MPa.
4. The method of remotely controlling water pump venting as recited in claim 3, wherein: the electric valve is an electric butterfly valve.
5. The method of remotely controlling water pump venting as recited in claim 4, wherein: the water pump is characterized in that a first manual valve is arranged on a water inlet pipe of the water pump, and a second manual valve and a multifunctional control valve which are connected with the electric valve in series are arranged on a water outlet pipe of the water pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210986227.2A CN115306737A (en) | 2022-08-17 | 2022-08-17 | Method for remotely controlling exhaust of water pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210986227.2A CN115306737A (en) | 2022-08-17 | 2022-08-17 | Method for remotely controlling exhaust of water pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115306737A true CN115306737A (en) | 2022-11-08 |
Family
ID=83863557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210986227.2A Pending CN115306737A (en) | 2022-08-17 | 2022-08-17 | Method for remotely controlling exhaust of water pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115306737A (en) |
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2022
- 2022-08-17 CN CN202210986227.2A patent/CN115306737A/en active Pending
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