CN108560645B - Constant-pressure water supply system and method of constant-frequency pump - Google Patents
Constant-pressure water supply system and method of constant-frequency pump Download PDFInfo
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- CN108560645B CN108560645B CN201810643859.2A CN201810643859A CN108560645B CN 108560645 B CN108560645 B CN 108560645B CN 201810643859 A CN201810643859 A CN 201810643859A CN 108560645 B CN108560645 B CN 108560645B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 250
- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000001502 supplementing effect Effects 0.000 claims abstract description 12
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000007921 spray Substances 0.000 claims description 15
- 239000003638 chemical reducing agent Substances 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 14
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 238000009628 steelmaking Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 8
- 239000003546 flue gas Substances 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000001914 filtration Methods 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000008400 supply water Substances 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- E03B7/077—Arrangement of backflow preventing 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
- E03B7/078—Combined units with different devices; Arrangement of different devices with respect to each other
-
- 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
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)
- Structural Engineering (AREA)
- Control Of Positive-Displacement Pumps (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention belongs to the technical field of converter steelmaking, and particularly relates to a constant-pressure water supply system and method of a constant-frequency pump. The invention omits the necessary variable-frequency water pump in the constant-pressure water supply device through reasonable arrangement of the self-supplementing water pipeline, the automatic water supplementing valve group, the water tank, the fixed-frequency water supply pipeline, the water return pipeline and related components, saves the investment of the frequency converter, reduces the PLC control program, does not need a pressure detection instrument to control the rotation speed of the water pump, and greatly reduces the construction investment. When the water demand changes suddenly, the requirements of pressure and flow can be met at any time, and the water demand can be regulated in real time and controlled automatically. The reaction is rapid and timely, so that the process time of transmitting signals by the instrument and giving out instructions to the motor to regulate the water quantity again is saved; hardware equipment is reduced in the control process, the fault rate is greatly reduced, and the service life of the equipment is prolonged.
Description
Technical Field
The invention belongs to the technical field of converter steelmaking, and particularly relates to a constant-pressure water supply system and method of a constant-frequency pump.
Background
The flue gas generated in the process of the converter steelmaking industry is one of the main atmospheric pollutants, and the gas and the iron-containing dust in the flue gas are recycled and utilized, and the current dry dedusting process is widely applied to one-time dedusting of the converter gas because the temperature of the flue gas in the converter steelmaking reaches 1600 ℃ or more, so that the wet dedusting process with higher original energy consumption is gradually replaced. In the dry dedusting process, after the flue gas is cooled through the vaporization flue, the temperature is still about 1000 ℃, and at the moment, the flue gas is rapidly cooled through the evaporative cooler, and the flue gas quantity and the temperature change frequently and the change speed are quite high due to the complicated working condition of the converter flue gas, so that the key technology in control is realized by effectively cooling and ensuring that the sprayed water is completely evaporated. At present, in terms of control model and control valve hardware assurance, a technology system already has mature technology, but how to ensure that the water supply pressure before the control valve is kept not to become a key factor in the process of instantaneously opening the control valve from 0 to 100 percent. In the prior art, a variable-frequency water supply pump is selected to supply water to a water spraying system, but in the process that the pressure detection signal is given to the PLC, a control system commands the frequency converter to restart the acceleration and deceleration operation of the pump until the water supply pressure reaches the required pressure, a plurality of reaction times are needed, and the process of converter steelmaking flue gas change is possibly delayed. Based on this situation, the water supply device including other situations where the water demand is frequently changed and the corresponding speed is particularly timely is also required to be supplied by the constant pressure water supply device with the constant frequency pump.
Disclosure of Invention
The invention provides a constant-pressure water supply system and a constant-pressure water supply method of a constant-frequency pump, which have the purposes of timely and fast response under the condition of ensuring water pressure under the condition of frequent change of water demand, simple structure, investment cost reduction and long-term stable operation, long service life and low failure rate.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the constant pressure water supply system of the constant frequency pump at least comprises a self-supplementing water pipeline and an EC spray valve group, wherein the output end of the self-supplementing water pipeline is communicated with a water tank through the automatic water supplementing valve group, the output end of the water tank is connected with the input end of the constant frequency water supply pipeline, the output end of the constant frequency water supply pipeline is communicated with the EC spray valve group, the output end of the constant frequency water supply pipeline is connected with the input end of a water return pipeline in parallel through a reducing joint, and the output end of the water return pipeline is communicated with the water tank.
The fixed-frequency water supply pipeline comprises a fixed-frequency water supply pump and a check valve, the input end of the fixed-frequency water supply pump is communicated with the water tank, the output end of the fixed-frequency water supply pump is communicated with the input end of the check valve, and the output end of the check valve is communicated with the EC spray valve group.
The constant-frequency water supply pipeline is also provided with two manual butterfly valves, namely a first manual butterfly valve and a second manual butterfly valve, wherein the input end of the first manual butterfly valve is communicated with the water tank, the output end of the first manual butterfly valve is communicated with the input end of the constant-frequency water supply pump, the input end of the second manual butterfly valve is communicated with the output end of the check valve, and the output end of the second manual butterfly valve is communicated with the EC spray valve group.
The fixed-frequency water supply pipeline is also provided with a filter and flexible joints, the input end of the filter is communicated with the output end of the first manual butterfly valve, the output end of the filter is communicated with the input end of the fixed-frequency water supply pump, and the flexible joints are provided with two parts which are respectively connected to the two sides of the fixed-frequency water supply pump.
The filter adopts a Y-shaped filter.
The fixed-frequency water supply pipelines are arranged in two, and the two fixed-frequency water supply pipelines are connected in parallel.
The water return pipeline is provided with a safety relief valve, the input end of the safety relief valve is communicated with the reducer union, and the output end of the safety relief valve is communicated with the water tank.
The water return pipeline also be provided with manual butterfly valve, the input of manual butterfly valve communicate with the output of safety relief valve, the output and the water tank intercommunication of manual butterfly valve.
The automatic water supplementing valve group comprises three manual butterfly valves and a remote control valve, wherein two manual butterfly valves are arranged on two sides of the remote control valve and are connected with a third manual butterfly valve in parallel.
A constant pressure water supply method of a constant frequency pump is characterized in that: the fixed-frequency water supply pump is selected, and the fixed-frequency water supply pump is selected to be the required lift and the maximum required flow; after the water pump is started, the water pressure at the water consumption position is constant, but the flow rate is frequently changed, namely the outlet pressure can be ensured by setting the outlet pressure to reach the required pressure through a spring in a safety relief valve body according to the principle of mechanical pressure regulation of a safety relief valve, so that the water source for supplying certain pressure to the water consumption position is regulated, the outlet pressure is ensured at any time, when the water flow rate at the water consumption position is reduced, the water pressure is higher than the set pressure, the surplus water is returned to the water tank through a water return pipeline, and when the suddenly required waterway is increased, the water quantity returned to the water tank is reduced immediately, so that the water pressure at the EC spray valve group is ensured to be constant; the automatic water supplementing valve group can automatically supplement water according to the liquid level, so that the water storage capacity of the water tank is ensured, and the normal operation of the water supply device is ensured.
The beneficial effects of the invention are as follows:
1. the structure of the invention omits a frequency conversion water pump which is necessary in the constant pressure water supply device, saves the investment of a frequency converter, reduces the PLC control program, does not need a pressure detection instrument to control the rotation speed of the water pump, and greatly reduces the construction investment cost.
2. When the water demand changes suddenly, the requirements of pressure and flow can be met at any time, and the water demand can be regulated in real time and controlled automatically. The reaction is quick and timely, and the process time of transmitting signals by the instrument and giving out instructions to the motor to regulate the water quantity again is saved.
3. Hardware equipment is reduced in the control process, the fault rate is greatly reduced, and the service life of the equipment is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of the connection structure of the present invention.
In the figure:
1-a water tank; 2-a remote control valve; 3-a filter; 4-a fixed-frequency water supply pump; a 5-flexible joint; 6-check valve; 7-a fixed-frequency water supply pipeline; 8-reducing joint; 9-a safety relief valve; 10-manual butterfly valve, 11-return water pipeline, 12-blowdown pipeline.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
the constant pressure water supply system of a constant frequency pump shown in fig. 1 at least comprises a self-replenishing water pipe and an EC spray valve group, wherein the output end of the self-replenishing water pipe is communicated with a water tank 1 through the automatic water replenishing valve group, the output end of the water tank 1 is connected with the input end of a constant frequency water supply pipe 7, the output end of the constant frequency water supply pipe 7 is communicated with the EC spray valve group, the output end of the constant frequency water supply pipe 7 is also connected with the input end of a water return pipe 11 in parallel through a reducing joint 8, and the output end of the water return pipe 11 is communicated with the water tank 1.
Preferably, the fixed-frequency water supply pipeline 7 comprises a fixed-frequency water supply pump 4 and a check valve 6, the input end of the fixed-frequency water supply pump 4 is communicated with the water tank 1, the output end of the fixed-frequency water supply pump 4 is communicated with the input end of the check valve 6, and the output end of the check valve 6 is communicated with the EC spray valve group.
Preferably, the return pipeline 11 is provided with a safety relief valve 9, the input end of the safety relief valve 9 is communicated with the reducer union 8, and the output end of the safety relief valve 9 is communicated with the water tank 1.
Preferably, the automatic water replenishing valve group comprises three manual butterfly valves 10 and a remote control valve 2, wherein two manual butterfly valves 10 are arranged on two sides of the remote control valve 2 and are connected with a third manual butterfly valve 10 in parallel.
In actual use, the fixed-frequency water supply pump 4 is selected, and the fixed-frequency water supply pump 4 is selected to be the required lift and the maximum required flow. After the water pump is started, the water pressure of the water consumption is constant, but the flow rate is frequently changed, namely, the outlet pressure can be ensured by setting the outlet pressure to reach the required pressure through a spring in the safety relief valve 9 by the principle of mechanical pressure regulation of the safety relief valve 9, so as to adjust the water source for supplying certain pressure to the water consumption, ensure the outlet pressure at any time, and return the surplus water to the water tank through the water return pipeline 11 when the water pressure is higher than the set pressure along with the reduction of the water flow rate of the water consumption, and immediately reduce the water quantity returned to the water tank when the suddenly required waterway is increased so as to ensure the constant water pressure at the EC spray valve group. The automatic water supplementing valve group can automatically supplement water according to the liquid level, so that the water storage capacity of the water tank 1 is ensured, and the normal operation of the water supply device is ensured. The filter is arranged on the automatic water supplementing valve group, so that good water supply quality can be ensured. The check valve is arranged to prevent water from being pumped directly into the backup pump and returned to the water tank when one water pump is in operation. The reducer union 8 is provided for connecting the constant-frequency water supply pipeline 7 and the water return pipeline 11 with different pipe diameters.
The automatic water replenishing valve group is provided with three manual butterfly valves 10 and a remote control valve 2, and a bypass is arranged for realizing manual water replenishing during maintenance. Under normal conditions, two manual butterfly valves on the upper and lower main pipelines of the remote control valve 2 are opened, the manual butterfly valve on the bypass is closed, and automatic water supplementing is realized by controlling the opening and closing of the electric ball valve through the liquid level; in an accident state, two manual butterfly valves on the upper and lower main pipelines of the remote control valve 2 are closed, and the manual butterfly valves on the bypass are manually opened and closed, so that manual water supplementing is realized. The remote control valve 2 is overhauled during manual water supplementing, and the automatic state is recovered as soon as possible.
The invention provides a constant-frequency and constant-pressure water supply device which can timely and quickly respond under the condition of ensuring water pressure under the condition of frequent change of water demand, and realizes the maintenance of related equipment of a constant-pressure water supply system of a constant-frequency pump without influencing the normal working water supply system of the constant-pressure water supply system of the constant-frequency pump.
Embodiment two:
a constant pressure water supply system of a constant frequency pump as shown in fig. 1, based on embodiment 1: the fixed-frequency water supply pipeline 7 is also provided with two manual butterfly valves 10, namely a first manual butterfly valve and a second manual butterfly valve, wherein the input end of the first manual butterfly valve is communicated with the water tank 1, the output end of the first manual butterfly valve is communicated with the input end of the fixed-frequency water supply pump 4, the input end of the second manual butterfly valve is communicated with the output end of the check valve 6, and the output end of the second manual butterfly valve is communicated with the EC spray valve group.
Preferably, the fixed-frequency water supply pipeline 7 is further provided with a filter 3 and a flexible joint 5, the input end of the filter 3 is communicated with the output end of the first manual butterfly valve, the output end of the filter 3 is communicated with the input end of the fixed-frequency water supply pump 4, and the flexible joint 5 is provided with two flexible joints which are respectively connected to two sides of the fixed-frequency water supply pump 4.
Preferably, the filter 3 is a Y-type filter.
In actual use, the fixed-frequency water supply pipeline 7 is also provided with two manual butterfly valves 10, which mainly control each water pipeline in an accident or maintenance state, including automatic water supplementing pipelines, and when the electric valve is maintained, the bypass manual butterfly valves 10 can be opened to manually supplement water; the manual butterfly valve 10 can be closed before and after the water pump for maintenance when the water pump is in maintenance, so that the water pump set for the spare water can supply water normally. The filter 3 is arranged on the fixed-frequency water supply pipeline 7, so that the quality of water supplied by the fixed-frequency water supply pipeline is ensured, and the particle size of the supplied water containing particles is ensured to be within a certain range. The flexible joint 5 is arranged on the fixed-frequency water supply pipeline 7 to ensure that the vibration of the water pump and the vibration of the pipeline are not mutually interfered. The filter 3 adopts a Y-shaped filter, and the advantages of the Y-shaped filter in operation include full automation, no maintenance, large filtering area, high filtering screen efficiency, long service life, stainless steel material, selectable filtering precision and complete specification. Compared with other filtering equipment, the water quality treatment device is one of the most effective equipment in reclaimed water recycling engineering, and the water quality treated by the Y-type filter not only reaches the national specified discharge standard, but also achieves the purposes of repeated and cyclic utilization.
Embodiment III:
a constant pressure water supply system of a constant frequency pump as shown in fig. 1, based on embodiment 1: the said process
The fixed-frequency water supply pipelines 7 are arranged in two, and the two fixed-frequency water supply pipelines 7 are connected in parallel.
In the concrete implementation, two fixed-frequency water supply pipelines 7 are arranged, but in the actual use, only one of the two fixed-frequency water supply pipelines is used, and the other main function is standby, namely, when one is in a problem or overhauling, the other fixed-frequency water supply pipeline can ensure production. Thereby ensuring the continuity of the operation of the device.
Embodiment four:
a constant pressure water supply system of a constant frequency pump as shown in fig. 1, based on embodiment 1: the water return pipeline 11 is also provided with a manual butterfly valve 10, the input end of the manual butterfly valve 10 is communicated with the output end of the safety relief valve 9, and the output end of the manual butterfly valve 10 is communicated with the water tank 1.
In actual use, the manual butterfly valve 10 is arranged on the water return pipeline 11, and the main function is to control each water pipeline in order to facilitate accidents or maintenance.
Fifth embodiment:
a constant pressure water supply system of a constant frequency pump as shown in fig. 1, based on embodiment 1: the water tank 1 is also provided with a sewage drain pipeline 12, and the input end of the sewage drain pipeline 12 is communicated with the bottom of the water tank 1.
When in actual use, after the water tank 1 is used for a period of time, certain sediment can be generated at the bottom of the water tank 1, and the sewage can be removed from the water tank 1 in time by the arrangement of the sewage discharge pipeline 12, so that the water quality of the water tank is ensured.
In summary, according to the technical scheme of the invention, through reasonable arrangement of the self-water-supplementing pipeline, the automatic water-supplementing valve group, the water tank 1, the constant-frequency water supply pipeline 7, the water return pipeline 11 and related components, the frequency conversion water pump which is necessary in the constant-pressure water supply device is omitted, the investment of the frequency converter is saved, the PLC control program is reduced, the pressure detection instrument is not needed for controlling the rotation speed of the water pump, and the construction investment is greatly reduced. When the water demand changes suddenly, the requirements of pressure and flow can be met at any time, and the water demand can be regulated in real time and controlled automatically. The reaction is rapid and timely, so that the process time of transmitting signals by the instrument and giving out instructions to the motor to regulate the water quantity again is saved; hardware equipment is reduced in the control process, the fault rate is greatly reduced, and the service life of the equipment is prolonged.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
The technical solutions between the embodiments may be combined with each other, but it is necessary to base the implementation on the basis of those skilled in the art that when the combination of technical solutions contradicts or cannot be implemented, it should be considered that the combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention. The components and structures not specifically described in this embodiment are well known in the art and are not described in detail herein.
Claims (1)
1. A constant pressure water supply method of a constant frequency pump is characterized in that: the constant-pressure water supply system of the fixed-frequency pump at least comprises a self-replenishing water pipe and an EC spray valve group, wherein the output end of the self-replenishing water pipe is communicated with a water tank through the automatic water replenishing valve group, the output end of the water tank is connected with the input end of the fixed-frequency water supply pipe, the output end of the fixed-frequency water supply pipe is communicated with the EC spray valve group, the output end of the fixed-frequency water supply pipe is also connected with the input end of a water return pipe in parallel through a reducing joint, and the output end of the water return pipe is communicated with the water tank; the fixed-frequency water supply pipeline comprises a fixed-frequency water supply pump and a check valve, the input end of the fixed-frequency water supply pump is communicated with the water tank, the output end of the fixed-frequency water supply pump is communicated with the input end of the check valve, and the output end of the check valve is communicated with the EC spray valve group; the fixed-frequency water supply pipeline is also provided with two manual butterfly valves, namely a first manual butterfly valve and a second manual butterfly valve, wherein the input end of the first manual butterfly valve is communicated with the water tank, the output end of the first manual butterfly valve is communicated with the input end of the fixed-frequency water supply pump, the input end of the second manual butterfly valve is communicated with the output end of the check valve, and the output end of the second manual butterfly valve is communicated with the EC spray valve group; the fixed-frequency water supply pipeline is also provided with a filter and flexible joints, the input end of the filter is communicated with the output end of the first manual butterfly valve, the output end of the filter is communicated with the input end of the fixed-frequency water supply pump, and the flexible joints are provided with two parts which are respectively connected to the two sides of the fixed-frequency water supply pump; the filter adopts a Y-shaped filter; the fixed-frequency water supply pipelines are arranged in two, and the two fixed-frequency water supply pipelines are connected in parallel; the input end of the safety relief valve is communicated with the reducer union, and the output end of the safety relief valve is communicated with the water tank; the water return pipeline is also provided with a manual butterfly valve, the input end of the manual butterfly valve is communicated with the output end of the safety relief valve, and the output end of the manual butterfly valve is communicated with the water tank; the automatic water supplementing valve group comprises three manual butterfly valves and a remote control valve, wherein two manual butterfly valves are arranged on two sides of the remote control valve and are connected with a third manual butterfly valve in parallel;
the method comprises the following steps: the fixed-frequency water supply pump is selected, and the fixed-frequency water supply pump is selected to be the required lift and the maximum required flow; after the water pump is started, the water pressure at the water consumption position is constant, but the flow rate is frequently changed, namely the outlet pressure can be ensured by setting the outlet pressure to reach the required pressure through a spring in a safety relief valve body according to the principle of mechanical pressure regulation of a safety relief valve, so that the water source for supplying certain pressure to the water consumption position is regulated, the outlet pressure is ensured at any time, when the water flow rate at the water consumption position is reduced, the water pressure is higher than the set pressure, the surplus water is returned to the water tank through a water return pipeline, and when the suddenly required waterway is increased, the water quantity returned to the water tank is reduced immediately, so that the water pressure at the EC spray valve group is ensured to be constant; the automatic water supplementing valve group can automatically supplement water according to the liquid level, so that the water storage capacity of the water tank is ensured, and the normal operation of the water supply device is ensured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810643859.2A CN108560645B (en) | 2018-06-21 | 2018-06-21 | Constant-pressure water supply system and method of constant-frequency pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810643859.2A CN108560645B (en) | 2018-06-21 | 2018-06-21 | Constant-pressure water supply system and method of constant-frequency pump |
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| Publication Number | Publication Date |
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| CN108560645A CN108560645A (en) | 2018-09-21 |
| CN108560645B true CN108560645B (en) | 2024-03-01 |
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| CN201810643859.2A Active CN108560645B (en) | 2018-06-21 | 2018-06-21 | Constant-pressure water supply system and method of constant-frequency pump |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2700410Y (en) * | 2003-11-25 | 2005-05-18 | 刘柏林 | Activation circulation constant pressure water supplying device for high building pool |
| CN2753417Y (en) * | 2004-12-14 | 2006-01-25 | 上海连成（集团）有限公司 | Power frequency pump fire control constant pressure water supply apparatus |
| JP2008267080A (en) * | 2007-04-24 | 2008-11-06 | Matsushita Electric Works Ltd | Water supply system |
| CN205012403U (en) * | 2015-07-21 | 2016-02-03 | 鞍钢集团工程技术有限公司 | Water supply system with pressure release reflux unit |
| CN208472854U (en) * | 2018-06-21 | 2019-02-05 | 中国重型机械研究院股份公司 | A kind of constant pressure water supply system of fixed frequency pump |
-
2018
- 2018-06-21 CN CN201810643859.2A patent/CN108560645B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2700410Y (en) * | 2003-11-25 | 2005-05-18 | 刘柏林 | Activation circulation constant pressure water supplying device for high building pool |
| CN2753417Y (en) * | 2004-12-14 | 2006-01-25 | 上海连成（集团）有限公司 | Power frequency pump fire control constant pressure water supply apparatus |
| JP2008267080A (en) * | 2007-04-24 | 2008-11-06 | Matsushita Electric Works Ltd | Water supply system |
| CN205012403U (en) * | 2015-07-21 | 2016-02-03 | 鞍钢集团工程技术有限公司 | Water supply system with pressure release reflux unit |
| CN208472854U (en) * | 2018-06-21 | 2019-02-05 | 中国重型机械研究院股份公司 | A kind of constant pressure water supply system of fixed frequency pump |
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| CN108560645A (en) | 2018-09-21 |
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