CN100365216C

CN100365216C - Secondary pressing pump station water supply system

Info

Publication number: CN100365216C
Application number: CNB200510086880XA
Authority: CN
Inventors: 姚宏; 田盛
Original assignee: Beijing Jiaotong University
Current assignee: Beijing Jiaotong University
Priority date: 2005-11-15
Filing date: 2005-11-15
Publication date: 2008-01-30
Anticipated expiration: 2025-11-15
Also published as: CN1773031A

Abstract

The present invention relates to a secondary pressing pump station water supply system, which is provided with double water sources of a water storage pool and metro water inlet pipes for water supply, wherein the metro water inlet pipe (13) is connected with the water storage pool (6) by the metro water inlet pipe (15) with an electromagnetic valve. A pipe line (9) with a check valve and an electromagnetic valve is connected with an excess pressure utilizing regulating tank (1), the excess pressure utilizing regulating tank is connected with the water inlet pipe (15) by a return pipe line (10) with a check valve and a gate valve or a butterfly valve, and the excess pressure utilizing regulating tank enters the water storage pool. The tail end of the water inlet pipe (15) is provided with a liquid level control device (12), and the excess pressure utilizing regulating tank and the water outlet of the water storage pool are connected with a user water service pipe (14) by a connecting pipe line (3) with a check valve and a gate valve or a butterfly valve, a connecting pipe line (4) with a frequency conversion small pump set and a connecting pipe line (5) with a frequency conversion big pump set. Compared with the conventional secondary pressing pump station, the secondary pressing pump station water supply system can save 30 to 80% of energy and about 50 % of the volumetric capacity of the water storage pool. The secondary pressing pump station water supply system is suitable for new pump stations and expanded and reconstructed pump stations and overcomes the abuse of the existing water supply mode.

Description

A kind of secondary pressing pump station water supply system

Technical field

The present invention relates in a kind of municipal engineering water supply network or terminal compression system midway, relate in particular to a kind of secondary pressing pump station water supply system.

Background technology

Development along with the city, the urban water supply secondary pressing pump station has been an indispensable ingredient in sub-district and the urban skyscraper feedwater, this is because the local hydraulic pressure of city water-supply pipe network is not high enough, water directly can not be delivered to high level, the hydraulic pressure of waterline network end is lower, so just must water be fed to the user by secondary pressing pump station, guaranteeing each user's water requirement, so second pressure water supply is the water consumption rich and influential family in city.

At present, the routine work mode of secondary pressing pump station mostly is to adopt the water in the city planting ductwork directly to enter storage of low level reservoir and regulating pondage, delivers to high-rise user with pressure pump after low level reservoir suction pressurization then.The overbottom pressure of city water-supply pipe network (along with the position of booster station in city planting ductwork is different and different, generally at 0.18Mpa-0.50Mpa) has been wasted energy just by reactive power consumption fully like this.Why secondary pressing pump station works like this, be because: (1) water supply company does not allow water pump directly to draw water from urban pipe network, can cause when water use peak water supply network pressure to descend like this, influences the water supply capacity of pipe network; (2) urban pipe network comes the water yield to change, can not guarantee the pressure pump pump-out constantly, can not guarantee that pressure pump stablizes operate as normal, in order to make water pump energy steady operation that the reservoir of regulating pondage must be set, store big flow, regulate low discharge, make full use of the urban pipe network overbottom pressure, just must solve above-mentioned two problems.

Existing energy saving in pumping station water supply measure has energy-saving and frequency-variable, power transmission and transformation system is energy-conservation, electrical machine energy-saving, no negative pressure pipe network overbottom pressure is energy-conservation etc., wherein energy-saving and frequency-variable has developed relatively ripely, the constant pressure frequency conversion water system of being set forth as the CN2344445Y patent is on the basis of original general pump way of supplying water energy-conservation about 30%, in recent years, in order to utilize the pipe network overbottom pressure energy-conservation, pipe network overbottom pressure use device and non-negative pressure method of water supply device have appearred in China, patent announcement number is CN2471837Y, the utility model patent that name is called pipe network overbottom pressure use device discloses a kind of " pipe network overbottom pressure use device ", be provided with playpipe in the pond of this device and mix diffuser, playpipe and mixing diffuser are located on same the axis, playpipe is connected with water inlet pipe, mixes diffuser and links to each other with water pump; This utility model is simple in structure, make full use of pipe network residue pressure energy, save a large amount of pumping station operation electric energy, but the weak point that exists is: pipe network overbottom pressure use device is difficult to form the water sprayer water intake mode under lower ductwork pressure situation, only reach and to play the high-pressure hose low-pressure water on the certain pressure basis certain energy-saving effect is arranged, therefore energy-saving effect is not fine, and the cycle-index of the water yield in the reservoir does not reach designing requirement, cause the reservoir water quality deterioration easily, owing in the storage or saving pond, being provided with playpipe and mixing the diffuser transformation and get up complicated.Patent announcement number is " a pipe network non-negative pressure water-supply installation " for the CN2703798Y patent name, comprise water inlet pipe, the Flow-rate adjustment jar that is connected with pipe network, the normal pressure feed pipe that has flap valve, pressurized water supply pipe, be connected in series the water pump assembly of pump flap valve, outfall sewer, the switch board that is connected with user's pipeline, the Flow-rate adjustment jar is connected on the water inlet pipe by a bypass pipe, which is provided with automatic air intake-exhaust device and fluid level controller, outfall sewer is provided with pressure sensor, and water pump assembly, fluid level controller, pressure sensor are connected with switch board.This utility model bypass pipe is connected the bottom of Flow-rate adjustment jar, its compact conformation, reasonable, saved pipeline length greatly, be easy to arrange, install easy to connect, cause negative pressure can for tap water pipe network or other waterline network, can rationally utilize tap water pipe network pressure water supply, playing supercharging current stabilization and Flow-rate adjustment, is a kind of desirable pipe network non-negative pressure water-supply installation.But the weak point that exists is: owing to do not regulate and deposit water source equipment, use this equipment can cause the rapid reduction of peripheral ductwork pressure when water use peak, influence the municipal water supply safety.And this equipment is subjected to the restriction of municipal water supply company, can only be applicable to the water supply of newly-built less outputs such as single or several building, Beijing water supply company regulation: water supply flow just allows installation below 20m3/h.Therefore, when the water yield is worth greater than this, or the sub-district can not utilize this equipment need build life water storage and fire water box the time, and can not be used for the transformation of existing large-scale sub-district water supply compression system and newly-built.

Summary of the invention

It is energy-conservation that secondary pressing pump station energy-saving water supply system of the present invention makes full use of the pipe network surplus pressure, overcome the overbottom pressure waste problem that existing secondary pressurization technology exists, the water supply that has also overcome simultaneously the existence of pipe network overbottom pressure use device and pipe network non-negative pressure water-supply installation is dangerous, deficiencies such as the scope of application is little and shortcoming, this system not only has the automatic control feedback device, and the overbottom pressure in the system utilizes regulating tank also to have regulating pondage, storing the ability that hydraulic pressure and waterpower are distributed, is a kind of security performance height, a kind of booster station energy-saving water supply system of (applicable to newly built and improved all size booster station) applied widely.

Technical scheme of the present invention:

A kind of secondary pressing pump station water supply system comprises that reservoir, pump group, connecting pipe, overbottom pressure utilize regulating tank, control device, pressure sensor, liquid level feedback device, fluid level control device.

This system has reservoir and municipal water inlet pipe double water source supplies water;

The municipal administration water inlet pipe links to each other with reservoir by the municipal water inlet pipe that has electromagnetic valve, also utilizes regulating tank to link to each other by having flap valve with electromagnetic valve pipeline and overbottom pressure simultaneously;

Overbottom pressure utilizes regulating tank to link to each other with the municipal water inlet pipe that has electromagnetic valve by the water return pipeline that has flap valve and gate valve or butterfly valve, enter reservoir, at the terminal fluid level control device of installing of municipal water inlet pipe, the connecting pipe of band flap valve and gate valve or butterfly valve, have the connecting pipe of the little pump group of frequency conversion and have three connecting pipe parallel connections of connecting pipe of the big pump group of frequency conversion, water side in parallel links to each other with user's water pipe, and water inlet end in parallel utilizes the regulating tank outlet pipe to link to each other with the reservoir outlet pipeline that has gate valve or butterfly valve with overbottom pressure;

Described control device links to each other with electromagnetic valve, big or small pump, pressure sensor, liquid level feedback device on the pipeline.

The effect that the present invention is compared with prior art had:

Secondary pressing pump station energy-saving water supply system of the present invention is used water pressure different according to the position of pumping plant in city planting ductwork with the user applicable to the secondary pressing pump station of newly built and improved all size scale, and energy-saving efficiency also has nothing in common with each other.Adopt the technology of the present invention that existing conventional secondary pressing pump station is transformed, can make full use of original frequency conversion equipment, not only save improvement expenses, but also can on the variable frequency water supply basis, further save pumping station operation expense 30-80%; For newly-built pumping plant, utilize the present invention technology not only can reach above-mentioned energy-saving effect, also can on original secondary water-supply basis, reduce reservoir volume about 50% even can not establish reservoir simultaneously, can save initial investment and construction period effectively; No matter this technology is used in newly-built pumping plant or old pumping plant transformation, the pipe network overbottom pressure that all can effectively utilize conventional secondary water-supply pumping plant waste reaches purpose of energy saving; Simultaneously also can avoid the non-negative pressure method of water supply device effectively when user's water use peak, because the water yield of coming water supply network can not satisfy customer requirements and occur cutting off the water supply or too aspirate pipe network water and cause on every side water supply network hydraulic pressure to descend, and influences resident's water supply capacity phenomenon when serious.

As to supply water 20,000 tons/day booster station, the pumping plant intake pressure is 0.18Mpa, the pumping plant outlet pressure is that 0.4Mpa is an example, adopt this water supply and energy saving system can be on original secondary pressurization basis energy-conservation about 50%, can save about 4000 yuan of the electricity charge every day, Beijing output every day is about 2,000 ten thousand tons, if Beijing is on original secondary pressing pump station basis, all adopt this patented technology, fractional energy savings is by 30% estimation on existing basis, can be Beijing every day and save about 4,800,000 yuan of the electricity charge, then calculated by 300 days in 1 year and just can save 1,440,000,000 yuan of the electricity charge, not only can alleviate the shortage of electric power situation of Beijing effectively, also can reduce water supply cost, can alleviate the burden of user and municipal water supply department, as be generalized to the whole nation and will have bigger economic benefit and social benefit.

Description of drawings

Fig. 1 is a kind of secondary pressing pump station water supply system schematic diagram.

Among the figure: overbottom pressure is utilized regulating tank 1, control device 2, band flap valve and the connecting pipe 3 of gate valve or butterfly valve, the connecting pipe 4 that has the little pump group of frequency conversion, the connecting pipe 5 that has the big pump group of frequency conversion, reservoir 6,

pressure sensor

7 and 8, has flap valve and electromagnetic valve pipeline 9, is had the water return pipeline 10 of flap valve and gate valve or butterfly valve, the reservoir outlet pipeline 11 that has gate valve or butterfly valve, fluid level control device 12, municipal water inlet pipe 13, user's water pipe 14, the municipal water inlet pipe 15 that has electromagnetic valve, liquid level feedback device 16.

The specific embodiment

Fig. 1 is a kind of secondary pressing pump station energy-saving water supply system schematic diagram, this system comprises that overbottom pressure utilizes regulating tank 1, control device 2, the connecting pipe 3 of band flap valve and gate valve or butterfly valve, the connecting pipe 4 that has the little pump group of frequency conversion, the connecting pipe 5 that has the big pump group of frequency conversion, reservoir 6,

pressure sensor

7 and 8, have flap valve and electromagnetic valve pipeline 9, the water return pipeline 10 that has flap valve and gate valve or butterfly valve, the reservoir outlet pipeline 11 that has gate valve or butterfly valve, fluid level control device 12, municipal water inlet pipe 13, user's water pipe 14, the municipal water inlet pipe 15 that has electromagnetic valve, liquid level feedback device 16.

This system has reservoir 6 and municipal water inlet pipe 13 double water sources supply water, and municipal water inlet pipe 13 links to each other with reservoir 6 by the municipal water inlet pipe 15 that has electromagnetic valve, also utilizes regulating tank 1 to link to each other by having flap valve with electromagnetic valve pipeline 9 and overbottom pressure simultaneously; Overbottom pressure utilizes regulating tank 1 to link to each other with the municipal water inlet pipe 15 that has electromagnetic valve by the water return pipeline 10 that has flap valve and gate valve or butterfly valve, at the municipal water inlet pipe that the has electromagnetic valve 15 terminal fluid level control devices 12 of installing that enter reservoir 6, overbottom pressure utilizes the water outlet of regulating tank 1 and reservoir 6 to link to each other with user's water pipe 14 by connecting pipe 3, the connecting pipe 4 that has the little pump group of frequency conversion of being with flap valve and gate valve or butterfly valve, the connecting pipe 5 that has the big pump group of frequency conversion;

Electromagnetic valve on described control device 2 and the pipeline 9,15, big or small pump,

pressure sensor

7 and 8, the liquid level feedback device 16 on the

pipeline

4,5 link to each other.

In system's running, control device 2 receives

pressure sensor

7 and 8 pressure feedback signals, send signal to electromagnetic valve on the pipeline 9,15 and the big or small pump on the

pipeline

4,5 by the device processing, come flexibly the method for operation of control system in time, reach effective energy-conservation purpose.When water level in water pool reaches the highest or lowest water level of setting; control device 2 receives the feedback signal of liquid level feedback device 16; after treatment; control device 2 can send control signal and give system's start and stop size pump; reach the purpose of safety of protection pumping plant water system; the control device of native system can design according to the difference of three kinds of methods of operation, and the inner components and parts of control device all belong to the national standard product, and the control device assembling realizes easily.

This system divides following three kinds of situations operation:

First kind of operating condition: when city planting ductwork hydraulic pressure and the water yield all can satisfy the requirement of user's water, when simultaneously municipal ductwork pressure is greater than the desired minimum pressure of supply water of water supply department,

pressure sensor

7 and 8 outgoing signals are given control device 2, control device 2 spreads out of command signal and cuts out electromagnetic valve on the municipal water inlet pipe 15 that has electromagnetic valve, open the electromagnetic valve that has pressure check valve and electromagnetic valve pipeline 9, this moment, pumping plant was from municipal water inlet pipe 13 water inlets, by pipeline 9, overbottom pressure is utilized regulating tank 1, the connecting pipe 3 of band flap valve and gate valve or butterfly valve is directly supplied with the user, the unnecessary water yield is got back to reservoir 6 by the water return pipeline 10 that has flap valve and gate valve or butterfly valve, the reservoir water level rises, fluid level control device 12 rises, when reaching the peak level of liquid level feedback device 16 settings, fluid level control device is closed the pipe network water inlet, in case tank water is excessive, at this moment big or small pump is all stopped using, with conventional secondary pressing pump station the pressure water of city planting ductwork is put into reservoir, compares because big or small pump is stopped using and just saved the pumping station operation expense of this period widely from the draw water method of operation of supplying with the user of low level reservoir with variable frequency pump then;

Second kind of operating condition: when the city planting ductwork water yield satisfies pressure and can not satisfy the requirement of user's water, when simultaneously municipal ductwork pressure is greater than the desired minimum pressure of supply water of water supply department,

pressure sensor

7 and 8 outgoing signals are given control device 2, control device 2 spreads out of command signal and opens the electromagnetic valve that has on pressure check valve and the electromagnetic valve pipeline 9, close the electromagnetic valve on the municipal water inlet pipe 15 that has electromagnetic valve, start the little pump of frequency conversion on the connecting pipe 4 that has the little pump group of frequency conversion, pumping plant is from municipal water inlet pipe 13 water inlets, by having pressure check valve and electromagnetic valve pipeline 9, overbottom pressure is utilized regulating tank 1, the connecting pipe 4 that has the little pump group of frequency conversion supplies water to the user, the unnecessary water yield is got back to reservoir 6 by the water return pipeline 10 that has flap valve and gate valve or butterfly valve, the reservoir water level rises, enable the lower little pump of lift and big pump is stopped using by control device 2, pressure water directly enters little pump, improved the preceding intake pressure of little pump greatly, reduced the work lift of water pump, with conventional secondary pressing pump station the pressure water of city planting ductwork is put into reservoir, compares owing to improved the pumping station operation expense that little pump water inlet lift has just been saved this period widely from the low level reservoir method of operation of supplying with the user of drawing water with variable frequency pump then;

The third operating condition: when municipal ductwork pressure and the water yield all can not satisfy user's water or breaking out of fire,

pressure sensor

7 and 8 outgoing signals are given control device 2, control device spreads out of command signal and opens the electromagnetic valve that has on flap valve and the electromagnetic valve pipeline 9 and have electromagnetic valve on the municipal water inlet pipe 15 of electromagnetic valve, pumping plant comes water from municipal water inlet pipe 13, enter overbottom pressure and utilize regulating tank 1 and reservoir 6, by the pipeline 9 that has flap valve and electromagnetic valve, overbottom pressure is utilized regulating tank 1, supply with the user by the connecting pipe 5 that has the big pump group of frequency conversion, at this moment only enable the higher big pump of lift and little pump is stopped using, after mixing, city planting ductwork water inlet and reservoir water outlet directly enter big pump, improved the intake pressure of big pump effectively, reduced the work lift of water pump, with conventional secondary pressing pump station the pressure water of city planting ductwork is put into reservoir, compares owing to improved the pumping station operation expense that big pump water inlet lift has just been saved this period widely from the low level reservoir method of operation of supplying with the user of drawing water with variable frequency pump then;

By above three kinds of way of supplying water, any pumping plant adopts this invention technology can guarantee that all any period in one day can both be effectively and utilize overbottom pressure in the pipe network to improve the intake pressure of water pump directly or indirectly safely, supply water directly or indirectly and give the user, simultaneously when user's water use peak, this kind pumping plant method of supplying water can be avoided non-negative pressure water service system directly to take out water supply network ambient pressure that city planting ductwork brings descending and influence the problem of surrounding resident water effectively, and the present invention both had been applicable to newly-built pumping plant, also be applicable to and transform existing secondary pumping station, be not subjected to the pumping plant intake pressure, the water supply area of pumping plant, the restriction of water supply flow and hydraulic pressure, be applicable to big, in, small-sized various secondary pressing pump stations, according to the position difference of pumping plant in city planting ductwork, the pipe network overbottom pressure also has nothing in common with each other about 0.18-0.50Mpa, minimum overbottom pressure is 0.18Mpa, energy-saving effect also has nothing in common with each other, draw with existing conventional secondary pressing pump station operation by industrial experimentation and to compare fractional energy savings, save reservoir volume adjusted about about 50% generally at 30-80%.

Claims

1. secondary pressing pump station water supply system, comprise that reservoir, pump group, connecting pipe, overbottom pressure utilize regulating tank, control device, pressure sensor, liquid level feedback device, fluid level control device, it is characterized in that this system has reservoir (6) and municipal water inlet pipe (13) double water source supplies water;

Municipal administration water inlet pipe (13) links to each other with reservoir (6) by the municipal water inlet pipe (15) that has electromagnetic valve, also utilizes regulating tank (1) to link to each other by having flap valve with electromagnetic valve pipeline (9) and overbottom pressure simultaneously;

Overbottom pressure utilizes regulating tank (1) to link to each other with the municipal water inlet pipe (15) that has electromagnetic valve by the water return pipeline (10) that has flap valve and gate valve or butterfly valve, enter reservoir (6), at the terminal fluid level control device (12) of installing of municipal water inlet pipe (15), the connecting pipe (3) of band flap valve and gate valve or butterfly valve, have the connecting pipe (4) of the little pump group of frequency conversion and have (5) three connecting pipe parallel connections of connecting pipe of the big pump group of frequency conversion, water side in parallel links to each other with user's water pipe (14), and water inlet end in parallel utilizes regulating tank (1) outlet pipe to link to each other with the reservoir outlet pipeline (11) that has gate valve or butterfly valve with overbottom pressure;

Described control device (2) with have flap valve and electromagnetic valve pipeline (9) on electromagnetic valve and pressure sensor (7), user's water pipe (14) on pressure sensor (8), have electromagnetic valve on the municipal water inlet pipe (15) of electromagnetic valve, have the little pump group of frequency conversion on the connecting pipe (4) of the little pump group of frequency conversion, have the big pump group of frequency conversion on the connecting pipe (5) of the big pump group of frequency conversion, the liquid level feedback device (16) in the reservoir (6) links to each other.