CN2853917Y

CN2853917Y - Pipe net direct-connection negative pressure frequency control of speed water supply equipment

Info

Publication number: CN2853917Y
Application number: CN 200520114171
Authority: CN
Inventors: 张吉申; 张元森
Original assignee: SHIJIAZHUANG ZT HUIER TECHNOLOGY Co Ltd
Current assignee: SHIJIAZHUANG ZT HUIER TECHNOLOGY Co Ltd
Priority date: 2005-07-20
Filing date: 2005-07-20
Publication date: 2007-01-03
Anticipated expiration: 2015-07-20

Abstract

A ductwork direct connecting non-negative pressure variable-frequency control water-supply equipment belongs to secondary pressure water-supply equipment field. The device comprises a water inlet pressure transmitter 1, a water outlet pressure transmitter2, an intelligence control device 3, a variable-frequency control device 4, and a pressure water pump units 5. The prior non-negative pressure water-supply equipments all have mechanical anti-negative pressure devices, thereby the prior devices have complex structures, big volume, high failure rate, bad operation stability, and bad anti-negative pressure effect. The utility model uses the electronic anti-negative pressure device to replace the mechanical anti-negative pressure device, thereby the utility model has the advantages of simple structure, small volume, low cost, excellent anti-negative pressure effect, highly effective energy-saving, simplicity and practicality. The utility model not only guarantees that the water inlet pipe net does not produce negative pressure, but also meets the requirement of user maximally. The device can be used for new projects which needs secondary pressure because of the first water pressure is not sufficient, and the utility model also can be used to modify the water supply compression system.

Description

Pipe network direct connection non-negative-pressure variable frequency speed governing supply equipment

Technical field

The utility model belongs to the second pressure water supply apparatus field, and relating in particular to a kind of is the secondary pressurization non-negative pressure water-supply installation at water source with the tap water pipe network.

Background technology

Be that the second pressure water supply equipment at water source is divided into two classes at present with the tap water pipe network, one class is to dispose the common frequency control or the pressurized tank class pressurization supply equipment of pond or water tank, this kind equipment is put into pond or water tank with the pressure water of tap water pipe network earlier, and then by the water pump pressurization of from pond or water tank, drawing water.This type systematic wastes the pressure of tap water pipe network, and there is the secondary pollution at water source, it is big to take up an area of space and area, equipment investment is big, and the construction period is long, the running cost height, in addition, by float valve control pond or water tank water intake, the general requirements water pump has bottom valve, so the fault rate height in this type systematic.Second class is for being furnished with the pipe network direct connection supply equipment of anti-negative pressure device (current stabilization jar or pressure balancing tank etc.), pressure pump and frequency-converting control device of machinery.This kind equipment has removed pond or the water tank in the original system, for preventing that producing negative pressure at the pressure pump influent side influences the normal water of other user, increased mechanical anti-negative pressure device, but the anti-negative pressure device of its machinery has several automatic valves usually, complex structure, and volume is bigger, the fault rate height, operation stability is poor, and anti-negative pressure effect is undesirable, the regular maintenance difficulty.Utility model ZL 02269751.9 has proposed a kind ofly do not have directly ftercompction device automatically of negative pressure with the tap water of the anti-negative pressure device of machinery, this device has removed the anti-negative pressure device of machinery in second kind equipment, increased pressure ratio than control module, made device structure simpler.But its " comparison controller by detect, discharge pressure value poor of the intake pressure value of tap water pipe network and ftercompction water pump relatively; control the running speed of ftercompction pump " control method, the pipe network that can not effectively guarantee to intake does not produce negative pressure all the time and influences the normal water of other users.In addition, in control procedure, can not make full use of the tap water water source, reduce influence as far as possible user's water demand.

The utility model content

Goal of the invention of the present utility model provide a kind of simple and reliable, energy-efficient, pollution-free, low-cost, fault rate is low, can satisfy the pipe network direct connection non-negative-pressure variable frequency speed governing supply equipment of user's water demand to greatest extent.

The technical solution of the utility model is: a kind of simple and reliable, pipe network direct connection non-negative-pressure variable frequency speed governing supply equipment of meeting consumers' demand to greatest extent is provided.Comprise booster water pump unit, intake pressure transmitter, discharge pressure transmitter, intelligent controller and frequency changing regulating speed control apparatus.It is characterized in that the booster water pump unit directly and tap water pipe network and user's water supply network link, intake pressure transmitter, discharge pressure transmitter are electrically connected with two inputs of intelligent controller respectively, the output of intelligent controller is connected with the pressure signal input of frequency changing regulating speed control apparatus, and frequency changing regulating speed control apparatus is electrically connected with the booster water pump unit.

Employing is a criterion with the protection pressure that water pump assembly influent side pressure is not less than setting, by adjusting the method for the pressure of supply water deviant that the user sets, the pid control function that cooperates frequency changing regulating speed control apparatus, when being implemented in tap water pipe network output automatically, with the pressure constant-pressure operation of user's setting greater than user's water supply volume; When tap water pipe network output during less than user's water supply volume, adjust user's setting pressure automatically, the pipe network that not only guaranteed to intake do not produce negative pressure but also can be under new setting pressure constant pressure water supply; When pressure of supply water that tap water pipe network pressure of supply water is set more than or equal to the user, system stops pressurization automatically, enters holding state, is directly supplied water by the tap water pipe network; When the tap water pipe network stopped to supply water, system quit work automatically and enters holding state; When the water supply of running water pipe network recovery, when intake pressure was set protection pressure greater than water inlet, system recovered normal water supply automatically; When having a power failure, continue to supply water for low district user by the tap water pipe network, satisfy the purpose of user's water demand to greatest extent.

Compared with prior art, the utility model has following advantage:

1, replace the anti-negative pressure device of machinery with the anti-negative pressure technique of electronics, it is little to take up room.

2, middle retaining link such as pond, water tank, current stabilization jar, non-secondary pollution, environmentally-friendly sanitary have been removed.

3, make full use of the Based Intelligent Control function of the anti-negative pressure device of electronics, can satisfy user's water demand to greatest extent, anti-negative pressure is effective.

4, make full use of the original pressure of tap water pipe network, only insufficient pressure is partly replenished pressurization, efficient energy-saving.

5, owing to removed pond, water tank, current stabilization jar, do not have equipment fault points such as the higher float valve of fault rate, bottom valve of water pump, air inlet and exhaust valve, so equipment operation troubles rate is low, maintenance load is little, and is reliable and stable, and the life-span is long, is easy to management.

6, simple in structure, short construction period, initial investment is few, and operating cost is low.

7, the seepage that does not have the pond is saved the water source.

Description of drawings

Below in conjunction with drawings and Examples the utility model is described further.

Fig. 1 is a formation schematic diagram of the present utility model.

Fig. 2 is the electrical control schematic diagram of the utility model embodiment 1.

Fig. 3 is that the utility model embodiment 1 intelligent controller constitutes schematic diagram.

The specific embodiment

1 is the intake pressure transmitter among Fig. 1, Fig. 2, and 2 is the discharge pressure transmitter, and 3 is intelligent controller, and 4 is frequency changing regulating speed control apparatus, and 5 is the booster water pump unit, and 6,7,8 is valve.

In the present embodiment, intake pressure transmitter 1, discharge pressure transmitter 2, booster water pump unit 5 and valve 6,7,8 are known technology, no longer narrate at this.Frequency changing regulating speed control apparatus 4 adds a PID controller for the frequency converter of internal PID control function or the frequency converter that do not have an internal PID function.Intelligent controller 3 is critical components of the present utility model, the data acquisition process unit that is a single chip computer architecture (can be any two-way A/D input that has, the data acquisition process unit of one road D/A output and CPU element), it directly sends the pressure signal of intake pressure transmitter 1 and discharge pressure transmitter 2 into its A/D converting unit, after the data that A/D gathers send data processing unit to handle, export the feedback pressure input port that an analog signal is connected to frequency changing regulating speed control apparatus 4 by D/A converting unit delivery outlet, frequency changing regulating speed control apparatus 4 carries out operation with closed ring control according to this signal to booster water pump unit 5.

The course of work of the present utility model is summarized as follows:

In the DIP of frequency changing regulating speed control apparatus 4 computing, D=P0-(P+ Δ P)=P0-(P+ Δ P)=(P0-Δ P)-P, in the formula, D is a deviate, P0 is that the user sets value, P is the discharge pressure value of feedback, and Δ P is the adjusted value of intelligent controller 3, and (P0-Δ P) is adjusted actual pressure setting value, as seen when Δ P 〉=0, under the constant situation of user's pressure set points, increase an offset value delta P to discharge pressure, be equivalent to reduce the actual set force value.

In the work; intelligent controller 3 is gathered intake pressure in real time; and be not less than protection the pressure (〉=atmospheric pressure of setting with intake pressure; promptly do not have negative pressure) be criterion; the method of the additional correction value of the discharge pressure signal by giving frequency changing regulating speed control apparatus 4 is adjusted user's setting pressure indirectly.Analysis and judgement by 3 pairs of intake pressure signals of intelligent controller, different situations according to water inlet, setting pressure correction value to the user such as increases, subtracts, keeps at corresponding adjustment, and it is attached on the discharge pressure value, D/A mouth output one via intelligent controller 3 substitutes feedback pressure signal then, and it is directly sent into the feedback pressure input port of frequency changing regulating speed control apparatus 4, frequency changing regulating speed control apparatus 4 compares according to this feedback signal and user's setting pressure, and the booster water pump unit is carried out the control of PID operation with closed ring.The pipe network of realizing not only guaranteeing to intake do not produce negative pressure but also can be under new setting pressure constant pressure water supply, satisfy the purpose of user's water demand to greatest extent.

By as seen above-mentioned; when tap water pipe network water source can not satisfy user's water demand; the utility model is not to shut down in order to guarantee not produce negative pressure; influence user's water, but do not produce under the condition of negative pressure, by automatic adjustment pressure set points in assurance; system is worked under less pressure; supply water to the user to greatest extent, when having only the tap water pipe network to cut off the water, just can stop to supply water to the user.

By the foregoing description as can be known, no matter which kind of state tap water pipe network water source is in, and intake pressure of the present utility model remains at no negative pressure duty; Not producing negative pressure at the water inlet pipe network influences under the prerequisite of the normal water of other users, can adjust setup pressure value automatically according to the intake pressure situation, utilizes tap water pipe network resource to greatest extent, satisfies user's water demand.

The utility model does not have the retaining link, adopts water pump assembly and pipe network direct connection, and simple in structure, it is little to take up room, and initial investment is few, and operating cost is low, non-secondary pollution; Do not have the anti-negative pressure device of machinery, adopt described intelligence controller to realize the anti-negative pressure control of electronics, make full use of the pressure of tap water pipe network, energy-efficient, simple and practical, fully automatic operation, easy operating, reliable and stable.

It is the grassroot project of all occasions such as water source, the resident living area that needs the secondary pressurization, office, factory, commerce that the utility model can be widely used in the tap water, is particularly useful for the transformation to existing water supply compression system.Also be applicable to the middle and high district second pressure water supply of highrise building.

Claims

1, a kind of pipe network direct connection non-negative-pressure variable frequency speed governing supply equipment, comprise intake pressure transmitter, discharge pressure transmitter, intelligent controller, frequency changing regulating speed control apparatus and booster water pump unit, it is characterized in that the booster water pump unit directly and tap water pipe network and user's water supply network link, intake pressure transmitter and discharge pressure transmitter are electrically connected with two inputs of intelligent controller, the output of intelligent controller is connected with the pressure signal input of frequency changing regulating speed control apparatus, and frequency changing regulating speed control apparatus is electrically connected with the booster water pump unit.

2, according to the described pipe network direct connection of claim 1 non-negative-pressure variable frequency speed governing supply equipment, it is characterized in that described intelligent controller comprises A/D converting unit, data processing unit and D/A converting unit, two external input signals are electrically connected to the A/D converting unit, the A/D converting unit is electrically connected with data processing unit, data processing unit is electrically connected to the D/A converting unit, and the D/A converting unit has an electrical signal.