CN111779073A - Control system for stopping water supply of BPRT main motor - Google Patents
Control system for stopping water supply of BPRT main motor Download PDFInfo
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- CN111779073A CN111779073A CN202010632116.2A CN202010632116A CN111779073A CN 111779073 A CN111779073 A CN 111779073A CN 202010632116 A CN202010632116 A CN 202010632116A CN 111779073 A CN111779073 A CN 111779073A
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- conveying pipeline
- variable frequency
- pipeline
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 106
- 238000006243 chemical reaction Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 3
- 230000008901 benefit Effects 0.000 abstract description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 26
- 229910052742 iron Inorganic materials 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 239000008234 soft water Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 229910001339 C alloy Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000010459 dolomite Substances 0.000 description 1
- 229910000514 dolomite Inorganic materials 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- QMQXDJATSGGYDR-UHFFFAOYSA-N methylidyneiron Chemical compound [C].[Fe] QMQXDJATSGGYDR-UHFFFAOYSA-N 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/04—Domestic or like local pipe systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B11/00—Arrangements or adaptations of tanks for water supply
- E03B11/10—Arrangements or adaptations of tanks for water supply for public or like main water supply
- E03B11/16—Adaptations of devices for putting pumping plants in and out of operation, e.g. automatic control devices
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03B—INSTALLATIONS OR METHODS FOR OBTAINING, COLLECTING, OR DISTRIBUTING WATER
- E03B7/00—Water main or service pipe systems
- E03B7/07—Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons or valves, in the pipe systems
- E03B7/075—Arrangement of devices for control of pressure or flow rate
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/054—Input/output
Landscapes
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Structural Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a control system for stopping water supply of a BPRT (blast furnace power plant) main motor, which comprises booster pumps, variable frequency motors, variable frequency controllers, pressure controllers and a water conveying pipeline, wherein the two booster pumps are respectively connected to the water conveying pipeline, one water outlet of the water conveying pipeline is connected to a blast furnace, the other water outlet of the water conveying pipeline is connected to an external water pool, a pressure relief valve is arranged between the water pool and the water conveying pipeline, the pressure relief valve is in a normally closed state, when the water conveying pipeline has overhigh pressure, the pressure in the water conveying pipeline is relieved by opening the pressure relief valve to convey water into the water pool, the two booster pumps are respectively connected with the variable frequency motors, the variable frequency motors are connected with a PLC (programmable logic controller) control cabinet, the two booster pumps are respectively. The invention has the advantages of ensuring the pressure of the water delivery pipeline to be stable and not to cut off the water supply and avoiding the reactive loss under the condition of ensuring the normal production stability of the blast furnace.
Description
Technical Field
The invention relates to the technical field of iron making, in particular to a control system for stopping water supply of a BPRT main motor.
Background
Iron making is a technological process for extracting metallic iron from iron-containing minerals, and mainly comprises a blast furnace method, a direct reduction method, a melting reduction method and a plasma method. From the metallurgical point of view, iron making is the reverse of iron rusting and gradual mineralization, and simply, pure iron is reduced from iron-containing compounds. In actual production, pure iron is not present and an iron-carbon alloy is obtained.
The blast furnace method is commonly used for iron making. The blast furnace process is a process for continuously producing liquid pig iron in a vertical reactor, i.e., a blast furnace, from coke, iron-containing ore (natural agglomerates and sintered ore and pellets), and flux (limestone and dolomite). It is an important link in modern steel production. The modern blast furnace iron making is improved and developed by an ancient shaft furnace iron making method.
At present, the maximum flow rate is 350m3/h, the minimum flow rate is 100m3/h, and other water quantities directly return to the pool flow rate 290-540m3/h through a pressure relief valve. The power of the motor is consumed at 145-270KW per hour, and two small sets of soft water supply of 5m3/h are required to be started during the accident of the small sets of the blast furnace, so that a large amount of reactive power loss is generated.
Disclosure of Invention
The invention aims to provide a control system for stopping the water supply of a BPRT main motor, which has the advantages of ensuring the pressure of a water conveying pipeline to be stable and not to be cut off, avoiding reactive loss under the condition of ensuring the normal production stability of a blast furnace, and solving the problems of motor power loss, generation of a large amount of reactive loss and increase of production cost.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a stop BPRT owner motor control system for water supply, includes booster pump, inverter motor, variable frequency controller, pressure controller and hydraulic pipeline, two booster pumps are connected to hydraulic pipeline respectively, and a delivery port of hydraulic pipeline is connected to the blast furnace, and another delivery port of hydraulic pipeline is connected to outside pond, installs the relief valve between pond and the hydraulic pipeline, and inverter motor is connected respectively to two booster pumps, and two booster pumps are connected pressure controller respectively.
As a further scheme of the invention, the flow rate of the booster pump is 340m3/h, the head is 95m, and the total flow rate of the two booster pumps is 640m 3/h.
As a further scheme of the invention, the pressure controller is connected with a PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, a pressure gauge is arranged on the pressure controller, and the pressure controller and the PLC control cabinet form a pressure control system.
As a further scheme of the invention, the variable frequency motor is connected with a PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, the variable frequency motor is matched with a variable frequency controller, and the variable frequency motor and the PLC control cabinet form a variable frequency control system.
As a further scheme of the invention, the pressure relief valve is in a normally closed state, and when the pressure of the water conveying pipeline is too high, the pressure relief valve is opened to convey water into the water pool to relieve the pressure in the water conveying pipeline.
A control system for stopping water supply of a BPRT main motor comprises the following operation steps:
s1, enabling technical staff of a factory to electrically connect two variable frequency motors with variable frequency controllers with two booster pumps respectively, and then electrically connect two pressure controllers with the two booster pumps respectively;
s2, after the variable frequency motor and the pressure controller are respectively connected with the booster pump, the variable frequency motor and the pressure controller are respectively and electrically connected with a terminal row on a PLC control cabinet in the electric power chamber, the PLC control cabinet is connected with a control computer in the control chamber, and the computer is provided with a corresponding control program;
s3, a booster pump is communicated with a water conveying pipeline, two water outlet ports of the water conveying pipeline are respectively communicated with a blast furnace and a water pool, and a pressure relief valve arranged between the water conveying pipeline and the water pool is in a normally-closed state;
s4, constantly monitoring the pressure in the water conveying pipeline by a sensor connected with the pressure controller, feeding the real-time pressure back to the PLC control cabinet, displaying the obtained pressure value on a computer of a control room by the PLC control cabinet, and constantly viewing the pressure value in the water conveying pipeline by technicians; meanwhile, the set value of the pressure controller is adjustable, and the range of adjustment from-0.1 to 40MPa can be selected at will;
s5, controlling a frequency conversion controller through a computer in a control room, wherein the maximum flow rate required in the water conveying pipeline is 350m3/h, and the minimum flow rate is 100m3/h, controlling the output power of a frequency conversion motor by the frequency conversion controller according to an instruction transmitted by the computer, and controlling the output flow rate of a booster pump, so that the flow rate in the water conveying pipeline is between 350m3/h and 100m3/h, and the flow rate is controllable;
s6, when a small set accident of the blast furnace occurs, a technician inputs an adjusting instruction on a computer of a control room and then adjusts the pressure in the water conveying pipeline through the variable frequency control system and the pressure control system;
s7, when the water pipeline has an emergency situation of over-high pressure, the pressure relief valve can be opened through control, the water pipeline is communicated with the water pool, water in the water pipeline is conveyed into the water pool to relieve the pressure in the water pipeline, and after the pressure is recovered, the pressure relief valve is controlled to be closed.
Compared with the prior art, the invention has the following beneficial effects: a sensor connected with the pressure controller constantly monitors the pressure in the water conveying pipeline, feeds the real-time pressure back to the PLC control cabinet, and displays the obtained pressure value on a computer of a control room by the PLC control cabinet; the technical personnel adjust the set value of the pressure controller, and the variable frequency controller controls the output power of the variable frequency motor according to the instruction transmitted by the computer and controls the output flow of the booster pump. Guarantee the stable continuous water of conduit pressure through pressure controller and inverter motor, under the stable circumstances of guaranteeing the normal production of blast furnace, avoid reactive loss, the power saving 200KW per hour to can not need to supply soft water to reduce soft water and use when little set of accident.
Drawings
FIG. 1 is a schematic flow chart of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The original control system comprises: the booster pump room is provided with two booster pumps for operation, wherein each booster pump has the flow rate of 340m3/h, the lift of 95m, the motor is 160KW, the total flow rate of 640m3/h and the power of 320KW, the maximum flow rate is 350m3/h, the minimum flow rate is 100m3/h, and other water quantities directly return to the pool flow rate of 290 and 540m3/h through a pressure relief valve. The power of the motor is consumed at 145-270KW per hour, two small sleeves are required to be started for supplying soft water at 5m3/h in case of a small sleeve accident of the blast furnace, and the amount of soft water required by 6 small sleeves of the two blast furnaces at most needs 30m 3/h. The original control system can generate a large amount of reactive loss to cause the increase of production cost, and soft water is required to be provided when a small set of accidents of the blast furnace occur, so that the production efficiency can be reduced.
Example 2
Referring to fig. 1, an embodiment of the present invention: the utility model provides a stop BPRT main motor control system for water supply, including booster pump, inverter motor, inverter controller, pressure controller and hydraulic pipe, the flow of booster pump is 340m3/h, the lift 95m, two booster pumps are total to flow 640m3/h, two booster pumps are connected to hydraulic pipe respectively, a delivery port of hydraulic pipe is connected to the blast furnace, another delivery port of hydraulic pipe is connected to outside pond, install pressure relief valve between pond and the hydraulic pipe, pressure relief valve is in normally closed state. The two booster pumps are respectively connected with a variable frequency motor, the variable frequency motor is connected with a PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, a variable frequency controller matched with the variable frequency motor adopts digital wired transmission, data are interacted between the variable frequency controller and the PLC control cabinet in an RS485 communication mode, and the variable frequency motor and the PLC control cabinet form a variable frequency control system. The two booster pumps are respectively connected with a pressure controller, the pressure controller is connected with a PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, a pressure gauge is arranged on the pressure controller, and the pressure controller and the PLC control cabinet form a pressure control system. The pressure controller adopts a metal 316L diaphragm type sensor, and a pressure interface is vertically downward when the sensor is installed.
Example 3
The embodiment provided by the invention comprises the following steps: a control system for stopping water supply of a BPRT main motor comprises the following operation steps:
s1, enabling technical staff of a factory to electrically connect two variable frequency motors with variable frequency controllers with two booster pumps respectively, and then electrically connect two pressure controllers with the two booster pumps respectively;
s2, after the variable frequency motor and the pressure controller are respectively connected with the booster pump, the variable frequency motor and the pressure controller are respectively and electrically connected with a terminal row on a PLC control cabinet in the electric power chamber, the PLC control cabinet is connected with a control computer in the control chamber, and the computer is provided with a corresponding control program;
s3, a booster pump is communicated with a water conveying pipeline, two water outlet ports of the water conveying pipeline are respectively communicated with a blast furnace and a water pool, and a pressure relief valve arranged between the water conveying pipeline and the water pool is in a normally-closed state;
s4, constantly monitoring the pressure in the water conveying pipeline by a sensor connected with the pressure controller, feeding the real-time pressure back to the PLC control cabinet, displaying the obtained pressure value on a computer of a control room by the PLC control cabinet, and constantly viewing the pressure value in the water conveying pipeline by technicians; meanwhile, the set value of the pressure controller is adjustable, and the range of adjustment from-0.1 to 40MPa can be selected at will;
s5, controlling a frequency conversion controller through a computer in a control room, wherein the maximum flow rate required in the water conveying pipeline is 350m3/h, and the minimum flow rate is 100m3/h, controlling the output power of a frequency conversion motor by the frequency conversion controller according to an instruction transmitted by the computer, and controlling the output flow rate of a booster pump, so that the flow rate in the water conveying pipeline is between 350m3/h and 100m3/h, and the flow rate is controllable;
s6, when a small set accident of the blast furnace occurs, a technician inputs an adjusting instruction on a computer of a control room and then adjusts the pressure in the water conveying pipeline through the variable frequency control system and the pressure control system;
s7, when the water pipeline has an emergency situation of over-high pressure, the pressure relief valve can be opened through control, the water pipeline is communicated with the water pool, water in the water pipeline is conveyed into the water pool to relieve the pressure in the water pipeline, and after the pressure is recovered, the pressure relief valve is controlled to be closed.
Example 4
Taking the actual production index after the transformation of our factory as an example, after the pressure control system and the frequency conversion control system are on line, the stable and continuous water supply can be ensured, and when a small set of accidents happen, the soft water is not required to be supplied to reduce the soft water. After the transformation is finished, the electricity is saved by 200KW per hour, the flat peak electricity price is calculated by 0.46 yuan, the electricity fee is saved by 2208 yuan per day, 66240 yuan per month and 805920 yuan per year. Greatly reduces the production cost and increases the benefit.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. The utility model provides a stop BPRT main motor control system for water supply, includes booster pump, inverter motor, inverter controller, pressure controller and hydraulic pipeline, its characterized in that: the two booster pumps are respectively connected to the water conveying pipeline, one water outlet of the water conveying pipeline is connected to the blast furnace, the other water outlet of the water conveying pipeline is connected to an external water pool, a pressure relief valve is installed between the water pool and the water conveying pipeline, the two booster pumps are respectively connected with the variable frequency motor, and the two booster pumps are respectively connected with the pressure controller.
2. The control system for stopping the supply of water to the BPRT main motor according to claim 1, wherein: the flow rate of the booster pump is 340m3/h, the head is 95m, and the total flow rate of the two booster pumps is 640m 3/h.
3. The control system for stopping the supply of water to the BPRT main motor according to claim 1, wherein: the pressure controller is connected with the PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, a pressure gauge is arranged on the pressure controller, and the pressure controller and the PLC control cabinet form a pressure control system.
4. The control system for stopping the supply of water to the BPRT main motor according to claim 1, wherein: the variable frequency motor is connected with the PLC control cabinet, a Siemens S7-400 control module is arranged in the PLC control cabinet, the Siemens S7-400 control module is electrically connected with a matched control device through an electric wire, the variable frequency motor is matched with a variable frequency controller, and the variable frequency motor and the PLC control cabinet form a variable frequency control system.
5. The control system for stopping the supply of water to the BPRT main motor according to claim 1, wherein: the pressure relief valve is in the normal close state, and when the water pipeline has too high pressure, the pressure relief valve is opened to convey water into the water pool to reduce the pressure in the water pipeline.
6. A control system for stopping water supply of a BPRT main motor comprises the following operation steps:
s1, enabling technical staff of a factory to electrically connect two variable frequency motors with variable frequency controllers with two booster pumps respectively, and then electrically connect two pressure controllers with the two booster pumps respectively;
s2, after the variable frequency motor and the pressure controller are respectively connected with the booster pump, the variable frequency motor and the pressure controller are respectively and electrically connected with a terminal row on a PLC control cabinet in the electric power chamber, the PLC control cabinet is connected with a control computer in the control chamber, and the computer is provided with a corresponding control program;
s3, a booster pump is communicated with a water conveying pipeline, two water outlet ports of the water conveying pipeline are respectively communicated with a blast furnace and a water pool, and a pressure relief valve arranged between the water conveying pipeline and the water pool is in a normally-closed state;
s4, constantly monitoring the pressure in the water conveying pipeline by a sensor connected with the pressure controller, feeding the real-time pressure back to the PLC control cabinet, displaying the obtained pressure value on a computer of a control room by the PLC control cabinet, and constantly viewing the pressure value in the water conveying pipeline by technicians; meanwhile, the set value of the pressure controller is adjustable, and the range of adjustment from-0.1 to 40MPa can be selected at will;
s5, controlling a frequency conversion controller through a computer in a control room, wherein the maximum flow rate required in the water conveying pipeline is 350m3/h, and the minimum flow rate is 100m3/h, controlling the output power of a frequency conversion motor by the frequency conversion controller according to an instruction transmitted by the computer, and controlling the output flow rate of a booster pump, so that the flow rate in the water conveying pipeline is between 350m3/h and 100m3/h, and the flow rate is controllable;
s6, when a small set accident of the blast furnace occurs, a technician inputs an adjusting instruction on a computer of a control room and then adjusts the pressure in the water conveying pipeline through the variable frequency control system and the pressure control system;
s7, when the water pipeline has an emergency situation of over-high pressure, the pressure relief valve can be opened through control, the water pipeline is communicated with the water pool, water in the water pipeline is conveyed into the water pool to relieve the pressure in the water pipeline, and after the pressure is recovered, the pressure relief valve is controlled to be closed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632116.2A CN111779073A (en) | 2020-07-03 | 2020-07-03 | Control system for stopping water supply of BPRT main motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010632116.2A CN111779073A (en) | 2020-07-03 | 2020-07-03 | Control system for stopping water supply of BPRT main motor |
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| CN111779073A true CN111779073A (en) | 2020-10-16 |
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| CN202010632116.2A Pending CN111779073A (en) | 2020-07-03 | 2020-07-03 | Control system for stopping water supply of BPRT main motor |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201991036U (en) * | 2011-04-14 | 2011-09-28 | 辽宁国鼎机电自动化设备制造有限公司 | Intelligent pipe network laminated non-negative pressure water supply equipment |
| CN104196088A (en) * | 2014-09-09 | 2014-12-10 | 江南大学 | Frequency conversion speed regulation and constant pressure pipe network water supply system and control method thereof |
| CN106592682A (en) * | 2016-10-26 | 2017-04-26 | 江苏南极机械有限责任公司 | Marine variable-frequency constant-pressure water supply system |
| KR101753891B1 (en) * | 2016-11-28 | 2017-07-19 | (주)대우건설 | Apparatus and method of reduced operation for power consumption of parallel operation pump |
| CN206554167U (en) * | 2017-03-07 | 2017-10-13 | 华中科技大学 | Intelligent frequency-conversion regulator |
| CN108643278A (en) * | 2018-06-22 | 2018-10-12 | 安徽机电职业技术学院 | A kind of energy-saving Township water supply system and its water-supply control |
| CN110565734A (en) * | 2019-09-30 | 2019-12-13 | 湖南省大成水务发展有限责任公司 | Direct pressure water supply equipment capable of preventing cavitation and damage of water pump impeller |
-
2020
- 2020-07-03 CN CN202010632116.2A patent/CN111779073A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201991036U (en) * | 2011-04-14 | 2011-09-28 | 辽宁国鼎机电自动化设备制造有限公司 | Intelligent pipe network laminated non-negative pressure water supply equipment |
| CN104196088A (en) * | 2014-09-09 | 2014-12-10 | 江南大学 | Frequency conversion speed regulation and constant pressure pipe network water supply system and control method thereof |
| CN106592682A (en) * | 2016-10-26 | 2017-04-26 | 江苏南极机械有限责任公司 | Marine variable-frequency constant-pressure water supply system |
| KR101753891B1 (en) * | 2016-11-28 | 2017-07-19 | (주)대우건설 | Apparatus and method of reduced operation for power consumption of parallel operation pump |
| CN206554167U (en) * | 2017-03-07 | 2017-10-13 | 华中科技大学 | Intelligent frequency-conversion regulator |
| CN108643278A (en) * | 2018-06-22 | 2018-10-12 | 安徽机电职业技术学院 | A kind of energy-saving Township water supply system and its water-supply control |
| CN110565734A (en) * | 2019-09-30 | 2019-12-13 | 湖南省大成水务发展有限责任公司 | Direct pressure water supply equipment capable of preventing cavitation and damage of water pump impeller |
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Application publication date: 20201016 |