CN106194777A - Pump installation - Google Patents

Abstract

It is an object of the invention to provide cavitation that a kind of suppression produces because sucking environment and pump-out and raising draw water performance, reduce noise and vibration, prevent the pump installation of corrosion.This pump installation, including: pump unit, have and can be rotated, by motor, the impeller driven, and there is housing, described housing arranges in the way of covering the periphery of described impeller and is formed pump chamber by gabarit；Flow transducer, the flow of the liquid that detection is discharged from described pump unit；And pressure transducer, the force value in detection pump chamber.

Description

Pump installation

Technical field

The present invention relates to pump installation.

Background technology

The pump that patent documentation 1 is recorded includes pump unit, the motor driving pump unit and controls the control portion of motor, and And include being arranged on from the water flowing road of the fluid flowing of pump unit discharge for detecting the flow switch of the discharge of this liquid, peace It is contained in the pressure transducer on identical water flowing road and the pressurized tank for pressure accumulation.Little water yield detection signal is produced at flow switch And after the little water yield detection time maintaining regulation, control portion carries out certain time with the moulding pressure value of regulation to pressurized tank Pressure accumulation, has and stops the function of motor and pump up dynamic pressure setting value.

Prior art literature

Patent documentation

Patent documentation 1: Japanese Unexamined Patent Publication 2005-248899 publication

Summary of the invention

Invention is wanted to solve the technical problem that

Suction condition as pump, it is desirable to such as diversified in well water source etc. confession the most stable under environment is set Water, but deep at water level, suction tube caliber thin, cavitation occurs, because of the efficiency of pump under the conditions of the cross directional stretch length of suction tube etc. Decline and bubble is mixed into and results in noise and vibration, even promote corrosion, it is possible to cause drawing water.Patent documentation 1 The flow switch etc. recorded, it is impossible to the generation of detection cavitation.

It is an object of the invention to provide cavitation that a kind of suppression produces because sucking environment and pump-out and carry Height draw water performance, reduce noise and vibration, prevent the pump of corrosion.

For solving the means of technical problem

In order to solve technical problem, the pump installation of the present invention is characterised by, including: pump unit, having can be electronic Machine rotates the impeller driven, and has housing, and described housing is arranged and by gabarit in the way of covering the periphery of described impeller Form pump chamber；Flow transducer, is arranged on the water flowing road of the liquid flowing discharged from described pump unit, for detecting liquid Flow；And pressure transducer, it is arranged on identical water flowing road, for detecting the force value in pump chamber.

Invention effect

Because including the stream for detecting liquid the water flowing road being arranged on the liquid flowing discharged from described pump unit The flow transducer measured and the pressure transducer of the force value in detecting pump chamber being arranged on identical water flowing road, it is possible to Detection pump-out and force value simultaneously, such as by the hydraulic performance decline that draws water caused by the generation of detection cavitation, by motor Rotating speed is automatically adjusted to optimum such that it is able to solve above-mentioned technical problem.Thereby, it is possible to realize suppression because sucking environment and taking out The water yield and the cavitation that produces and raising draw water performance, reduce noise and vibration, prevent the effect of corrosion.

Accompanying drawing explanation

Fig. 1 is the axonometric chart of the pump installation of embodiments of the invention.

Fig. 2 is the figure being provided with pump cover on the pump installation of embodiments of the invention.

Fig. 3 is the performance diagram that draws water (force value in pump chamber and pump-out) of the pump installation of embodiments of the invention.

Fig. 4 be the pump installation of embodiments of the invention the performance diagram that draws water (consume electric power, pump-out, the efficiency of pump and Rotating speed).

Fig. 5 is the side cutaway view of the pump installation of embodiments of the invention.

Symbol description

1 motor

2 housings

3 case lid

4 impellers

5 pedestals

6 pressurized tanks

7 pressure transducers

8 flow transducers

9 control controllers

10 display controllers

11 pump covers

15 current

16 eddy current generation posts

17 ultrasonic sensors

18 Kalman's eddy current

20 draw water characteristic curve (not suppressing cavitation)

21 draw water characteristic curve (cavitation is had suppression)

23 cavitation generation points

24 maximum (top) speeds

25 optimum speeds

100 pump installations

101 pump units

102 Karman vortex streaming ultrasonic flow sensors

Detailed description of the invention

Hereinafter, referring to the drawings, embodiments of the present invention are illustrated.Below, as it can be seen, by pump installation 100 Pedestal 5 side is carried out regulation above-below direction as lower section and is illustrated.

Fig. 1 is the axonometric chart that the state after pump cover 11 dismantled by the pump installation 100 from the present invention.Fig. 2 is the pump dress of the present invention Put the axonometric chart of 100.

Pump installation 100 includes pump unit 101, pedestal 5, pressurized tank 6, pressure transducer 7, flow transducer 8 and pump cover 11, Wherein, pump unit 101 includes motor 1, impeller 4, the housing 2 of this impeller 4 built-in and closes the case lid of front surface of housing 2 3。

Pedestal 5 is the parts of approximately parallelepiped body shape.Be arranged above pedestal 5 pressurized tank 6, pressure transducer 7, flow transducer 8 and pump unit 101, they are fixed on the upper surface of pedestal 5.

Pressurized tank 6 is for storing the water after pump unit 101 is pressurizeed.

Pressure transducer 7 is arranged on from the water flowing road of the liquid flowing of pump unit 101 discharge, is the pressure in detection pump chamber The sensor of force value.

The flow of the detection liquid that flow transducer 8 is provided in from the water flowing road that the liquid that pump unit is discharged flows Sensor.

The testing result of pressure transducer 7 and the testing result of flow transducer 8 are imported into control controller 9, by Control to use controller 9 Comprehensive Control, thus control starting and the stopping of pump unit 101.

Pump cover 11 is the parts of the approximately parallelepiped body concave shape of lower surface opening.Pump cover 11 is free to be installed on pedestal 5 or from its dismantle.This is able to pump unit 101 and control controller 9 etc. are operated, repaired.

Pump cover 11, by being fixed on pedestal 5, covers the major part of pump unit 101, pressure between pump cover 11 and pedestal 5 Tank 6, pressure transducer 7 and flow transducer 8 whole.Utilize pump cover 11 can reduce the sound produced from pump unit 101 grade It is delivered to the misgivings of the outside of pump installation 100.

Then, the problem caused by the cavitation of pump is illustrated.

May send out under conditions of the suction lift height such as pump is deep at water level, suction tube caliber thin, the cross directional stretch length of suction tube Raw cavitation.

The cavitation of pump refers to that flow velocity great position pressure shows in the liquid stream of the high speed of head 101 generation When writing decline and then reach below saturated vapor pressure, produce steam and in liquid stream, produce the phenomenon in hole.When producing hole, The efficiency of pump declines, and bubble is mixed into and results in noise and vibration, it could even be possible to can not draw water.

Structure by the present invention as described below, it is achieved suppress the cavitation produced because sucking environment and improve Draw water performance, reduce noise and vibration, prevent the effect of corrosion.

Use Fig. 3 that the cavitation suppression control utilizing pressure transducer 7 and flow transducer 8 to carry out is illustrated. Fig. 3 is the performance diagram that draws water (force value in pump chamber and pump-out) of the pump installation of embodiments of the invention.Drawing water of pump Characteristic can represent by the relation of discharge pressure and pump-out as shown in Figure 3.That is, by having pressure transducer 7 and flow Sensor 8, detection discharge pressure and pump-out such that it is able to grasp characteristic curve (not having cavitation to suppress) 20 of drawing water gentle There is point 23 in cave phenomenon.As it was previously stated, cavitation is when flow velocity great position pressure is remarkably decreased, i.e. in big yield region Occur.But, in the pressure transducer of existing structure and the control of flow switch, can only be as the 4L/ stopping the water yield Near minute, i.e. 1 carries out water yield detection, so the change of pump-out can not be held, therefore cannot detect cavitation generation point 23.And on controlling, maintain maximum (top) speed 24, so in order to keep high flow velocity, the generation of cavitation may be caused more For significantly.

Then, use Fig. 4 that the technical scheme of suppression cavitation is illustrated.

Owing to sending out when cavitation is and reaches below Saturated water vapor pressure when flow velocity great position pressure is remarkably decreased Raw, solve it is possible to reduce rotating speed by the way of with more than holding saturated vapor pressure.But, if the most blindly Reduce rotating speed, then can cause the decline of pump performance, so optimized rotating speed adjustment have to be carried out.In the present embodiment, due to There is pressure transducer 7 and flow transducer 8, it is possible to drawn water characteristic by assurance, and accurately catch cavitation and occur Point 23, is adjusted to optimum speed 25 such that it is able to change as the characteristic curve that draws water (there is the suppression of cavitation) 21 Kind.

Then, mode and advantage thereof to various flow transducers illustrate.

Mode as flow transducer, it is possible to substantially distinguish with the mechanical movable portion either with or without test section.

Having vane type flow transducer in test section has the sensor in mechanical movable portion, it is arranged inside water passage There is impeller, utilize the rotating speed of increase and decrease proportional to flow to detect.The structure of vane type flow transducer and control are more Easily, it is possible to manufacture at low cost.

In test section does not has the sensor in mechanical movable portion, have and employ the Faraday's law relevant to electromagnetic induction Electromagnetic flow sensor and Karman vortex streaming ultrasonic flow sensor 102, Karman vortex streaming ultrasonic flow pass Sensor 102 as it is shown in figure 5, configure eddy current generation post 16, by making current 15 be produced by eddy current generation post 16 on water flowing road Kalman's eddy current 18, utilizes ultrasonic sensor 17 to detect phase contrast.The advantage of the two sensor can be listed below: because Test section does not all have mechanical movable portion, thus be not susceptible to foreign body be mixed into cause block, water flowing resistance is few.

In the present embodiment, it is shown that use Kalman's eddy current that tolerance foreign body is mixed into and can be formed cheaply The example of formula ultrasonic flow sensor 102.As key property, water yield detection range can be enumerated relatively wide, reach 3～60L/ Minute this point, and owing to not using electrode so being difficult to be affected this point by temperature and water quality.

And, by carrying flow transducer, it is possible to have following four functions.

First function is the function that display controller 10 can be utilized to show the water yield in real time.

Second function is can to add up Water usage and the duration of runs and show the function of accumulative Water usage.

3rd function is by arranging the water yield and the variable adjustment function of time at control controller 9 and setting arbitrarily The function that the water yield and any duration of runs operate automatically.For instance, it is possible to be applied to water as garden pour water or roof In the use of snow melt etc..This function is utilized to can be achieved with automatically operating, therefore, it is possible to save every day after initial setting Access the trouble of power supply.

4th function is can arbitrarily to change pump to stop the function of water yield condition.Such as, the pipe arrangement in underground leaks In the case of easily can not repairing pipe arrangement, leak by being adjusted to exceed from less than 4L/ minute of initial value by the stopping water yield Less than 8L/ minute of amount, and make pump action become intermittent working from continuously running, it is possible to expect to save the energy and suppression component mill Damage.

Claims (4)

1. a pump installation, it is characterised in that including:

Pump unit, has and can be rotated, by motor, the impeller driven, and have housing, and this housing is to cover outside described impeller The mode in week arranges and is formed pump chamber by gabarit；

Flow transducer, the flow of the liquid that detection is discharged from described pump unit；With

Pressure transducer, the force value in detection pump chamber.

2. pump installation as claimed in claim 1, it is characterised in that:

Described flow transducer does not have mechanical movable portion at flow testing division.

3. pump installation as claimed in claim 2, it is characterised in that:

Described flow transducer is ultrasound wave Karman vortex streaming.

4. pump installation as claimed in claim 1, it is characterised in that:

Described flow transducer has mechanical movable portion at flow testing division.