CN103015489B - The dual-purpose water system of differential pressure variable reservoir non-suction head - Google Patents
The dual-purpose water system of differential pressure variable reservoir non-suction head Download PDFInfo
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- CN103015489B CN103015489B CN201210533679.1A CN201210533679A CN103015489B CN 103015489 B CN103015489 B CN 103015489B CN 201210533679 A CN201210533679 A CN 201210533679A CN 103015489 B CN103015489 B CN 103015489B
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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
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Abstract
The dual-purpose water system of a kind of differential pressure variable reservoir non-suction head, relate to for water supply system, this system forms primarily of without negative pressure secondary pressurized equipment, conventional pond, emergent pond and sterilizing equipment decontaminating apparatus, conventional pond is connected with municipal water supply pipe respectively by float valve with emergent pond, commonly use and be connected by coupling cock between pond with emergent pond, conventional pond is connected with municipal water supply pipe by the connecting pipe L3 with high lift pump group, connecting pipe L3 and connecting pipe L1 and connecting pipe L2 is connected in parallel, and high lift pump group is identical with the metered flow of low-lift pump group.The present invention is based on without negative pressure secondary Pressure Unit, and the way of supplying water that the water storage being equipped with conventional pond and emergent pond composition is for subsequent use, pond with adopt independently supply channel to supply water without negative pressure secondary Pressure Unit, and sterilizing equipment decontaminating apparatus is set to solve water quality security, the present invention have energy-saving effect significantly, supply water stable and the reliable advantage of water quality safety.
Description
Technical field
The present invention relates to for water supply system, particularly relate to the dual-purpose water system of a kind of differential pressure variable reservoir non-suction head.
Background technology
Along with the fast development of Chinese Urbanization progress, city size is increasing, in order to solve the water supply from the region away from municipal network water supply, second pressure water supply system has become to serve a town with water an indispensable part, traditional secondary water supply system all arranges storage cistern, but the setting of storage cistern not only easily causes water quality to be polluted, and municipal network water supply overbottom pressure also can be caused to be not used, cause huge energy waste.In order to address this problem, Chinese patent 201730138U provides a kind of differential-pressure variable-type suction lift-free supercharging equipment, primarily of high-pressure pump group and low-lift pump group, flow meter, the control system composition of nothing suction journey steady-flow tank, intake pressure sensor, isocon, collecting fitting, discharge pressure sensor, parallel combination, utilize remaining pressure of piping system choose reasonable different capacity, lift but the pump variable frequency speed governing operation mode of same flow, improve motor service efficiency to greatest extent, energy-saving effect is obvious, and can not cause negative pressure to ductwork pressure.But the deficiency that this equipment exists is: owing to not regulating and deposit water source equipment, use when water use peak this equipment that periphery ductwork pressure can be caused sharply to reduce, affect municipal water supply safety.
Chinese patent CN100365216C provides a kind of secondary pressing pump station water supply system, this system comprises overbottom pressure and utilizes device and reservoir, adopt reservoir and municipal water inlet pipe double water source way of supplying water, this system, when ductwork pressure is normal, utilizes device to supply water directly to user by overbottom pressure; Supply water when ductwork pressure can not meet user, but when being greater than the minimum pressure of supply water of water supply department, starting overbottom pressure and utilize the little pump of device to pass through second pressure water supply; When ductwork pressure and the water yield all can not meet user's water, reservoir is mixed the large pumps water being utilized device by overbottom pressure with pipe network water supply.But this system still can not thoroughly solve the problem affecting municipal water supply safety when water use peak, because when ductwork pressure is very low, although reservoir is mixed with pipe network water supply, but still communicate with pipe network water source during large water supplying pump, periphery ductwork pressure so still can be caused sharply to reduce, affect municipal water supply safety, and the reservoir of this system is still met the problem that matter near water polluted, because reservoir and overbottom pressure utilize device to share a supply channel, therefore when pipe network long period stable water supply, the easy secondary pollution of reservoir pond hydropexis overlong time will be caused, water supply quality can not be guaranteed.
Summary of the invention
The invention provides the dual-purpose water system of a kind of differential pressure variable reservoir non-suction head, can not remaining pressure of piping system be made full use of to solve prior art, the problem that the dangerous and water supply quality of supplying water can not be guaranteed.
The present invention is primarily of steady flow compensator, high lift pump group, low-lift pump group, control device, connecting pipe and monitoring device composition, steady flow compensator is connected with municipal water supply pipe, steady flow compensator outlet is connected with municipal water supply pipe with the connecting pipe L1 with low-lift pump group respectively by the connecting pipe L2 with high lift pump group, with the connecting pipe L2 of high lift pump group be connected in parallel with the connecting pipe L1 of low-lift pump group, solving the technical scheme that its technical problem adopts is also comprise conventional pond, emergent pond and sterilizing equipment decontaminating apparatus, conventional pond is connected with municipal water supply pipe respectively by float valve with emergent pond, commonly use and be connected by coupling cock between pond with emergent pond, conventional pond is connected with municipal water supply pipe by the connecting pipe L3 with high lift pump group, connecting pipe L3 and connecting pipe L1 and connecting pipe L2 is connected in parallel, high lift pump group is identical with the metered flow of low-lift pump group.
The volume in above-mentioned conventional pond is no more than the metered flow per hour of high lift pump group or low-lift pump group.
In above-mentioned conventional pond, guide wall and water level monitor are set, in emergent pond, water level monitor is set.
Above-mentioned sterilizing equipment decontaminating apparatus is infrared sterilization or high-frequency electronic or disinfection by chlorine dioxide equipment.
Above-mentioned steady flow compensator is arranged pressure sensor and vacuum suppresser.
The outlet in above-mentioned steady flow compensator and conventional pond arranges electromagnetic valve.
Electromagnetic valve and pressure sensor are set between above-mentioned connecting pipe L2 and connecting pipe L3.
Above-mentioned connecting pipe L1 arranges overpressure protector.
Above-mentioned chlorination equipment arranges control device at regular time and quantity, only automatically comes into operation when pond way of supplying water.
Above-mentionedly prevent the tank water holdup time long, pollute, water pump and the control device of self-timing circulation primary is set.
The present invention is based on without negative pressure secondary Pressure Unit, and the way of supplying water that the water storage being equipped with conventional pond and emergent pond composition is for subsequent use, pond with adopt independently supply channel to supply water without negative pressure secondary Pressure Unit, and sterilizing equipment decontaminating apparatus is set to solve water quality security, not only can make full use of municipal ductwork pressure to carry out laminating water supply, conventional pond can be utilized when pipe network water supply insufficient pressure again to realize intermittent moisturizing, also can utilize emergent pond and the sterilizing equipment decontaminating apparatus Emergency water supply when city planting ductwork is cut off the water.
The invention has the beneficial effects as follows:
1, energy-saving effect is remarkable.Utilize remaining pressure of piping system, choose reasonable different capacity, lift but the pump group frequency control method of operation of same flow, improve motor service efficiency to greatest extent, operating cost significantly reduces.
2, water supply is stable, and water quality safety is reliable.The water supply problem utilizing conventional pond and emergent pond to solve the low and pipe network of city planting ductwork overbottom pressure to cut off the water, pond with adopt independently supply channel to supply water without negative pressure secondary Pressure Unit, be independent of each other, conventional pond adopts little volume simultaneously, and guide wall is set, guide wall can keep pond water flow, ensure that water quality safety; When pipe network is cut off the water, be then user's water supply by emergent pond and sterilizing equipment decontaminating apparatus, safe and reliable.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention;
1 steady flow compensator, 2 conventional ponds, 3 emergent ponds, 4 sterilizing equipment decontaminating apparatus, 5 municipal water supply pipes, 6 high lift pump groups, 7 low-lift pump groups, 8 coupling cocks, 9 pressure sensors, 10 overpressure protectors, 11 vacuum suppressers, 21 float valves, 22 guide walls, 23 water level monitors, 31 float valves, 32 water level monitors, 51 electromagnetic valves, 52 electromagnetic valves, 53 electromagnetic valves, 101 water supply networks, 102 users, 103 control device in figure.
Detailed description of the invention
As shown in the figure, the dual-purpose water system of a kind of differential pressure variable reservoir non-suction head, primarily of steady flow compensator 1, high lift pump group 6, low-lift pump group 7, control device 103, connecting pipe and monitoring device composition, steady flow compensator 1 is connected with municipal water supply pipe 5, steady flow compensator 1 exports and is connected with municipal water supply pipe 5 with the connecting pipe L1 with low-lift pump group 7 respectively by the connecting pipe L2 with high lift pump group 6, steady flow compensator 1 is arranged pressure sensor 9 and vacuum suppresser 11, with the connecting pipe L2 of high lift pump group 6 be connected in parallel with the connecting pipe L1 of low-lift pump group 7, water system also comprises conventional pond 2, the sterilizing equipment decontaminating apparatus 4 of emergent pond 3 and use disinfection by chlorine dioxide, conventional pond 2 is connected with municipal water supply pipe 5 by float valve 21, emergent pond 3 is connected with municipal water supply pipe 5 by float valve 31, commonly use and be connected by coupling cock 8 between pond 2 with emergent pond 3, conventional pond 2 is connected with municipal water supply pipe 5 by the connecting pipe L3 with high lift pump group 6, connecting pipe L3, connecting pipe L1 and connecting pipe L2 is connected in parallel, high lift pump group 6 is identical with the metered flow of low-lift pump group 7, maximum output is 210m3/h, the volume in conventional pond 2 is less than 210m3, in conventional pond 2, guide wall 22 and water level monitor 23 are set, in emergent pond 3, water level monitor 32 is set, steady flow compensator 1 outlet arranges electromagnetic valve 51, the outlet in conventional pond 2 arranges electromagnetic valve 53, electromagnetic valve 52 and pressure sensor 9 are set between connecting pipe L2 and connecting pipe L3, connecting pipe L1 arranges overpressure protector 10.
Control device 103 is connected with the high lift pump group 6 on connecting pipe L3, sterilizing equipment decontaminating apparatus 4, overpressure protector 10, electromagnetic valve 51, electromagnetic valve 52, electromagnetic valve 53 with the low-lift pump group 7 on pressure sensor 9, vacuum suppresser 11, connecting pipe L1, connecting pipe L2.During system cloud gray model, control device 103 receives the feedback signal of the pressure sensor 9 in steady flow compensator 1 and the pressure sensor between connecting pipe L2 and connecting pipe L2 9, with the work of Controlling solenoid valve 51, high lift pump group 6 and low-lift pump group 7, according to overbottom pressure, optimum selecting is carried out to high lift pump group 6 and low-lift pump group 7; When water supply network 101 overbottom pressure is low or pipe network is cut off the water, control device 103 by the high lift pump group 6 on Controlling solenoid valve 52, electromagnetic valve 53, connecting line L3 and sterilizing equipment decontaminating apparatus 4, thus realizes conventional pond and supplies water for user 102 to the pond of meeting an urgent need of the moisturizing or utilize without negative pressure secondary Pressure Unit.
Water system mode of operation of the present invention is divided into four kinds:
The first pattern: use water requirement when city planting ductwork hydraulic pressure can meet user, and when municipal ductwork pressure is greater than the minimum pressure of supply water of water supply department requirement, control device 103 is according to the pressure signal of pressure sensor 9, control device 103 shut electromagnetic valve 51, high lift pump group 6 and low-lift pump group 7, the water of water supply network 101 is directly supplied water for user 102 by municipal water supply pipe 5.Moisturizing, according to the sensed water level of water level monitor 23 and water level monitor 32, is carried out by float valve 21 and float valve 31 in conventional pond 2 and emergent pond 3.
The second pattern: use water requirement when city planting ductwork hydraulic pressure can not meet user, but when municipal ductwork pressure is greater than the minimum pressure of supply water of water supply department requirement, control device 103 is according to the pressure signal of pressure sensor 9, electromagnetic valve 51 opened by control device 103, first low-lift pump group 7 is started, constant pressure water supply is carried out for user 102 by pipeline L1, overpressure protector 10 on pipeline L1 provides overpressure protection for low-lift pump group 7, if low-lift pump group 7 is run a period of time and can not be reached user and use water requirement, control device 103 is according to the pressure sensor 9 between connecting pipe L2 and connecting pipe L3, low-lift pump group 7 can be closed, open the high lift pump group 6 on connecting line L2, carry out constant pressure water supply, if remaining pressure of piping system raises, control device 103 meeting switchback low-lift pump group 7 drive manner, reach the object of energy saving water supply.
The third pattern: use water requirement when city planting ductwork hydraulic pressure can not meet user, when unlatching overbottom pressure utilizes pump group can not meet the water requirement of user's use, control device 103 can will open electromagnetic valve 52 and electromagnetic valve 53, the water in conventional pond 2 is utilized to carry out moisturizing, at this moment the water of steady flow compensator 1 to be mixed into the high lift pump group 6 on connecting line L2 with the water in conventional pond by electromagnetic valve 51, carry out constant pressure water supply, at this moment low-lift pump group 7 is in closed condition, improved the intake pressure of high lift pump group 6 by the moisturizing in conventional pond, thus supply water for user 102.
4th kind of pattern: even if use water requirement when the extremely low conventional water replenishment of city planting ductwork hydraulic pressure does not still meet user, or city planting ductwork is when cutting off the water, high lift pump group 6 on control device 103 or shut electromagnetic valve 51, electromagnetic valve 52 and connecting line L2 and low-lift pump group 7, open the high lift pump group 6 on electromagnetic valve 53, connecting line L3 and sterilizing equipment decontaminating apparatus 4, manually open the coupling cock 8 between conventional pond 2 and emergent pond 3, by the water in emergent pond, user 103 is supplied water.
Water system of the present invention is supplied water by above-mentioned four kinds of patterns, both remaining pressure of piping system was made full use of, improve motor service efficiency to greatest extent, reduce operating cost, utilize emergent pond and conventional pond to carry out the sterilizing function of water storage auxiliary water supply, chlorination equipment simultaneously, ensure pipe network water supply safety and user's water safety.
Claims (8)
1. the dual-purpose water system of differential pressure variable reservoir non-suction head, primarily of steady flow compensator, high lift pump group, low-lift pump group, control device, connecting pipe and monitoring device composition, steady flow compensator is connected with municipal water supply pipe, steady flow compensator outlet is connected with municipal water supply pipe with the connecting pipe L1 with low-lift pump group respectively by the connecting pipe L2 with high lift pump group, with the connecting pipe L2 of high lift pump group be connected in parallel with the connecting pipe L1 of low-lift pump group, it is characterized in that also comprising conventional pond, emergent pond and sterilizing equipment decontaminating apparatus, conventional pond is connected with municipal water supply pipe respectively by float valve with emergent pond, commonly use and be connected by coupling cock between pond with emergent pond, conventional pond is connected with municipal water supply pipe by the connecting pipe L3 with high lift pump group, connecting pipe L3 and connecting pipe L1 and connecting pipe L2 is connected in parallel, high lift pump group is identical with the metered flow of low-lift pump group, electromagnetic valve and pressure sensor are set between connecting pipe L2 and connecting pipe L3, sterilizing equipment decontaminating apparatus is provided with control device at regular time and quantity, only automatically comes into operation when pond way of supplying water.
2. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that the volume in conventional pond is no more than the metered flow per hour of high lift pump group or low-lift pump group.
3. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that arranging guide wall and water level monitor in conventional pond, arranges water level monitor in emergent pond.
4. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that sterilizing equipment decontaminating apparatus is infrared sterilization or high-frequency electronic or disinfection by chlorine dioxide equipment.
5. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that steady flow compensator being arranged pressure sensor and vacuum suppresser.
6. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that the outlet in steady flow compensator and conventional pond arranges electromagnetic valve.
7. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that connecting pipe L1 arranges overpressure protector.
8. the dual-purpose water system of differential pressure variable reservoir non-suction head according to claim 1, is characterized in that, for preventing the tank water holdup time long, polluting, arranging water pump and the control device of self-timing circulation primary every day.
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| CN201210533679.1A CN103015489B (en) | 2012-12-12 | 2012-12-12 | The dual-purpose water system of differential pressure variable reservoir non-suction head |
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| CN201210533679.1A CN103015489B (en) | 2012-12-12 | 2012-12-12 | The dual-purpose water system of differential pressure variable reservoir non-suction head |
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| CN103015489B true CN103015489B (en) | 2015-11-25 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104612215B (en) * | 2014-12-25 | 2017-06-06 | 太仓市微贯机电有限公司 | One kind is without negative pressure pipe network pressurizing current stabilization automatic controller |
| CN104594452B (en) * | 2014-12-25 | 2017-02-08 | 江苏项瑛农机有限公司 | Tap water high and low pressure compensation equipment with automatic cleaning function |
| CN104791259B (en) * | 2015-04-20 | 2017-10-17 | 四川东工电机有限公司 | A kind of total head limit pump of energy flow automatic regulation |
| CN105155628A (en) * | 2015-10-12 | 2015-12-16 | 王伐帝 | Water storage type non-negative-pressure water supply facility |
| CN108286278A (en) * | 2018-04-04 | 2018-07-17 | 天津宏捷安装工程有限公司 | A kind of pipe network pressure-superposed compression system of frequency conversion |
| CN112031079A (en) * | 2020-08-25 | 2020-12-04 | 上海城市水资源开发利用国家工程中心有限公司 | System and method for optimizing water age of secondary water supply of residence |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004068348A (en) * | 2002-08-05 | 2004-03-04 | Eco Water:Kk | Privately owned water supply system |
| CN1773031A (en) * | 2005-11-15 | 2006-05-17 | 北京交通大学 | A secondary pressurized pump station water supply system |
| CN200971526Y (en) * | 2006-09-08 | 2007-11-07 | 张明亮 | Non-negative water supply equipment for spare water of water tank |
| CN201236360Y (en) * | 2008-07-23 | 2009-05-13 | 秦强 | Self-adaption cleaning chamber type ductwork laminating water supply equipment |
| CN203049681U (en) * | 2012-12-12 | 2013-07-10 | 德州市科源给水配套工程开发有限公司 | Differential-pressure variable water pond suction-stroke-free two-purpose water supply system |
-
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- 2012-12-12 CN CN201210533679.1A patent/CN103015489B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004068348A (en) * | 2002-08-05 | 2004-03-04 | Eco Water:Kk | Privately owned water supply system |
| CN1773031A (en) * | 2005-11-15 | 2006-05-17 | 北京交通大学 | A secondary pressurized pump station water supply system |
| CN200971526Y (en) * | 2006-09-08 | 2007-11-07 | 张明亮 | Non-negative water supply equipment for spare water of water tank |
| CN201236360Y (en) * | 2008-07-23 | 2009-05-13 | 秦强 | Self-adaption cleaning chamber type ductwork laminating water supply equipment |
| CN203049681U (en) * | 2012-12-12 | 2013-07-10 | 德州市科源给水配套工程开发有限公司 | Differential-pressure variable water pond suction-stroke-free two-purpose water supply system |
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Address after: No. 22, Decheng Road, Dezhou, Shandong, Shandong Patentee after: Shandong Keyuan water supply and drainage equipment Engineering Company Limited Address before: 253000 Shandong Dezhou Economic Development Zone East Red East Road West Liu Ji Village Wen Zhuang Road South Patentee before: Dezhou Keyuan Water Supply Associated Engineering Development Co., Ltd. |